Four-wheel drive helps to accelerate in icy conditions, it does not help braking.
Make slow, careful changes when it's snowy or icy. Slow down more than you normally would to take a turn. Give yourself triple the distance to slow to a stop. Don't turn hard.
Use windshield wiper fluid appropriate for freezing temperatures.
Put any rage or impatience aside and get to where you're going safely.
If you live in a place that clears the streets and you don't have to go anywhere, consider staying put. Wait a couple hours until the streets are cleared.
If you'll be driving somewhere more remote, have clothes and boots appropriate for the weather in case your car breaks down or gets stuck and you have to walk. I also keep a jug of water, flashlight, and blanket/sleeping bag in my trunk during winter for this reason.
This is very important, I've seen people try this and it just makes things worse. In another comment I suggested my favourite solution to getting stuck like this; have a one-handed garden pick or similar tool in the car so you can dig the tires out of the ice.