What have you changed about your lifestyle to deal with the cost of living increases?

This might overlap a bit with what you've said, but:

Just one streaming service at a time. Get netflix, binge watch the shows we want. Cancel netflix, get Disney+, binge watch the shows we want. Etc. Don't have them all running at once. Or if you want to save even more money, NZ laws are pretty generous for pirates really.
Use Libby to borrow ebooks from the library and read on your phone (I prefer white text on black background - i.e. dark mode).
Normally I would say to sign up to power/internet on 12 month contracts to get good deals, then change company every 12 months. It's pretty easy to switch. But recently I've found it hard to find the really good deals that there have been previously.
We go to the farmers market for fruit, veggies, and eggs every week. But if you buy a doughnut or coffee or fancy bread then you're undoing your savings 😆.
Use the Grocer app. You put in your shopping list, and it tells you the cheapest places to get things out of the big supermarkets + the warehouse. It also tells you different options, like the cheapest might be to go to 4 different stores, but it will tell you it's $1 more total if you go to just these two stores, or here's the cheapest store that has everything you want, and tells you the total so you can compare how much you save vs going to all the shops. My biggest complaint is probably that you can't just say "Milk", you've got to pick a specific one. So then if you pick a store brand, that's normally cheapest, it won't be available at other stores.
Growing veggies is fun but you've got to be dedicated to make it financially viable. In general, growing your own veggies is not cheaper than just buying them (some exceptions, e.g. if you buy broccoli seedlings then it's probably best to just buy broccoli from the store, but if you buy a courgette seedling for a couple of bucks, you'll probably get a KG of courgettes off of it, worth like $10). The problem is that the times you are growing them also happens to be when they are in season, which is when they are cheapest in the shop. Plus you have to deal with pests and provide nutrition.
If you commute a decent distance to work each day, there's a good chance an electric Leaf will pay for itself. Best as a second car, where you have another for longer distances (longer distance Leafs exist, but generally there are other cars more recommended when you get up to that price range).
Plan your meals out for the week before going to the supermarket. Cook big, and plan to freeze leftovers when suitable, or plan to eat multiple days of the same thing to save effort and get discounts buying bulk. Planning out your meals helps keep you focused at the supermarket, and helps reduce food waste. Write the date on them so you can use the older ones first. Old stuff from the freezer won't kill you, but tastes better if it has been frozen months not years.
Also try to plan meals that use fruit or vegetables that are in season. They will be a lot cheaper.
Clean your heat pump to make it work more efficiently (just open the top, pull out the filters, and vaccuum them).

That's all I can think of right now. Except don't get a pet. Old pets cost a lot more than young ones 😆

Regarding #1: stremio and Real Debrid and you have all streaming services for a couple of dollars a month.
- Which is piracy, just made simpler, right?
I should really post up a picture of our vegetable garden - we’ve got a couple of hundred square meters of vege garden as well as a 30sqm greenhouse, and we grow everything from seed so we’re quite set up for it. We do live on a lifestyle block though.
I’d also be shocked if we only got 1kg of courgettes from each plant too. Last year we had 3 and couldn’t give them away quickly enough to keep up while also eating them everyday. Some with cucumbers. We’ve also got about 40-50 brassicas in the ground, and are on our 3rd year of our own garlic and onion supply, and aiming to survive on our own potatoes only this year as well - last year harvested about 100kg worth and this year aiming to 3-4x that. We’re definitely keen gardeners though so I know that’s not for everyone.
- I should really post up a picture of our vegetable garden - we’ve got a couple of hundred square meters of vege garden as well as a 30sqm greenhouse, and we grow everything from seed so we’re quite set up for it. We do live on a lifestyle block though.
  Home gardening at scale can definitely be cheaper than store bought. But as you've said, most people don't have the space.
  I’d also be shocked if we only got 1kg of courgettes from each plant too. Last year we had 3 and couldn’t give them away quickly enough to keep up while also eating them everyday.
  Yeah you'd probably get more than 1KG per plant. They grow so much so fast.
  Some with cucumbers.
  I must be doing something wrong. Half the time I only get one cucumber from a plant. Sometimes I'll get a good plant and get three cucumbers. Never more or faster than we can eat though. But I'm only planting a couple of plants.
  We’ve also got about 40-50 brassicas in the ground, and are on our 3rd year of our own garlic and onion supply, and aiming to survive on our own potatoes only this year as well - last year harvested about 100kg worth and this year aiming to 3-4x that. We’re definitely keen gardeners though so I know that’s not for everyone.
  Do you manage to stagger or store a lot of it so it can last you through the year?
  And do you have a good way to deal with pests? One issue we have is caterpillars in the broccoli, so we tend to only grow it over the winter.
- Just to put it out there - super jealous that you're able to do this :)
And just to add, apps like grocer and Gaspy are game changers.
Another big saving for us is stocking up on meat when it’s cheap - either chicken (usually at packnsave) or pork ribs (usually at Gilmour’s) - we produce our own beef and lamb. As such we’ve got 3 deep freezers, and I can’t remember the last time we paid even $10/kg for meat
Thanks for the tip about the Grocer app, didn't even know it existed.

Wife and I changed our mind about having kids.

Once we had children I started to understand why some prefer being childfree. I wouldn't trade them for anything now, but man would life be simpler. I sometimes think of how much more money and freedom we would have.
Sucks, but understandable. I know a couple with a kid and they're cutting back and taking on debt just to stay above water. My buddy said he's looking at taking on a second job to make ends meet.
It's wild to think that a couple decades ago it wasn't unheard of for one person to be the sole breadwinner for two families.

Learn to fix things. Basic sewing, basic car maintenance, basic home maintenance. I’ve learned a lot over the years just trying to fix things myself. There’s a wealth of information on almost anything on the internet. Yes there will be a small upfront cost if you need to buy tools or supplies, but the ability to extend the life of things is worthwhile. E.g. I’ve managed to get a few more months or years from being able to fix my kids clothes or school shoes.

For me, don’t go to sites like cheapies too often. Too easy to get sucked into buying a deal of something you don’t need or had any intention of ever getting.

Yes!
I've been not-rich my entire life... I've always loved fixing things. It's so fulfilling... Please, everyone, learn this talent!
I personally enjoy doing DIY projects, and it's got the added benefit of (hopefully!) saving money compared to buying off the shelf.
Got some plans to spruce up a little outside canopy area at our place, and am planning to make some DIY furniture for it. It's great in that you still sort of get what you wanted, but at a cheaper cost, and you get to enjoy making it too.
- Well it's not always cheaper, but it's a great excuse to learn something new and buy new tools to play with :)

Basically what Dave wrote + no more unnecessary purchases (inc. cutting down on junk food), buying in bulk where possible, and keeping an eye out for deals and offers.

I've also switched to a cheaper mobile provider + plan (Skinny), turns out that I don't really use that much data, given how I'm almost always in a place with WiFi. That and halting

Coincidentally, I've also stopped drinking alcohol (which was for health reasons), so that's been saving me a decent bit of money (considering many a regretful monetary decisions were made whilst drunk). On the flip side, I haven't been to karaoke in a long time, and I'm not sure if sober karaoke would be any fun...

We don't buy things when we feel that the price has crossed the reasonable threshold. This means we rarely eat out anymore, I've stopped buying several food items that I enjoy at the grocery store, and we've cancelled all of our streaming services since they're so fragmented and expensive now. We usually spend a lot on entertainment, but companies have become so greedy that we don't spend anything with them now. Like Netflix when they decided that they won't let families share accounts anymore. I've had a Netflix subscription for over a decade. The only reason we were keeping it is because my mom and my son use it. Neither of them would subscribe on their own. But since we can't share with them we cancelled. Great plan, Netflix!

I changed to a super cheap mobile plan recently, since I'm usually on wifi and don't actually make calls so I really don't need much in that regard.

I've also just cancelled my kobo sub and have been going to the library. I mostly used kobo for indie authors so the library is a nice change of pace.

This was a huge one for me. Went from paying about $100/month on t-mobile to paying $180/year on mint Mobile (which uses t-mobile towers so basically the same service).
- You know you're replying to a New Zealand community right? T-Mobile isn't a thing here. The best we have is ~$20 a month in pre pay plans

Switched part of our mortgage to revolving credit. With higher interest rates, saves quite a bit, as long as you offset it.

This is a really good idea if you're in a position to be putting any cash savings aside. In a perfect world everyone would have 3 months of expenses in cash savings, obviously that's not always realistic, but if you combine that with an offset or revolving credit then you have the benefit of having that safety net while still saving the interest cost on that money. Our offset mortgage saves us about 100 bucks a week, a good chunk of that is just my provisional tax sitting aside waiting to pay the IRD.

Another one for us is reviewing our insurance options at least once per year. This has probably saved us at least $1500/year so very worthwhile. Currently have house and contents insurance with AMP, car insurance with cove and tower (as they are cheaper depending on the car), boat insurance also with tower, life insurance with Chubb and health insurance with NIB.

I also find it varies from year to year so I go through and recheck. The multi policy discounts don’t really seem to make up the difference.

This year our old house insurance provider was going to put us up to $320/month from $200/month. I ended up getting the same level of cover through AMP for $190/month.

Also make sure if you have sum insured policies that they are adjusted accordingly, so you’re not underinsured.
Unfortunately for us all our policies went up this year, but they are still the cheapest I could find.
We have got almost everything with AA, including health, as they were the cheapest for almost all. Life Insurance with Partner Life (previously BNZ Life), especially cheap for income protection.
Only our Nissan Leaf was a tad bit more expensive than an insurer I didn't know, but was only $100-200 per year; not worth the hassle in my opinion. For some reason AA thinks that a Leaf is more expensive to insure than our Corolla of similar value & age.

We have, but not specifically because of the cost of living. More that we had an expensive holiday, and now need to focus on savings again. So I've been pretty insistent that we cut the thoughtless spending and the treats, at least for the rest of the year and then can re-assess.

Most of this has manifested in food budget. I've limited us to $15 a day each max on food spending, and that includes going out for dinner or work drinks. So if I'm going to get a few wines on friday night that's a couple of days of making sure lunch comes from the grocery budget. So on that front I'm cooking up a weeks worth of curry or rice and beans or doing a roast if it's on special.

I grow spinach/broc in winter and tomato/kale in summer which takes the edge off veggie shopping prices.

My nearest Pizza Hut has always been one of the good ones, so their $5.50 ham and cheese pizza is excellent value. If I wannt pig out I'll grab one of those and put Baby Ray's or hot sauce on it.

Petrol is a non-issue for us as we both live in our CBD close to our offices and drive a hybrid anyway. We spend like, 20 bucks a month on gas.

Here are mine:

I don't buy fresh greens anymore, only frozen
almost no meat
food shopping more at Reduced To Clear
no visiting the op shop or Kmart
trying to always use my energy to mix a drink of oral rehydration salts or salt instead of sometimes grabbing a juice box
no occasional sushi
try to keep coffee to just one instant decaf coffee a day
cut dental hygienist visits down to 1 in the past 2 years (this one's actually bad, I'm hoping to reverse it)
not visit family as often (this one's bad too)
get people to buy me moisturiser from the supermarket for birthday and christmas

I know unless something radically changes things are going to get worse so my future ideas are:

maybe cut out the instant decaf altogether? (This one feels hard for some reason, but that stuff is so expensive)
plain oats instead of oats and pumpkin+sunflower seeds for breakfast
halve my vitamin supplement again
get the energy to gather receipts so I can try to update my disability allowance to today's prices

I don't know what else. Getting a bit scared tbh.

Everyone out here counting crumbs rather than dragging the rich from their homes.

There are some excellent tips in this thread. At the same time, we are descending into feudalism levels of inequality and we should be absolutely outraged that billionaires are even a thing while others struggle to survive.
Composting options for the diligent home gardener or pig farmer 💁🏻
Why not both? Unfortunately you have to keep living in the broken system while trying to fix the broken system