Robot vacuum with autoempty station. Scheduled to run over different areas of the house at the right times. We have pets so this is major. Bit fiddly to automate so that it doesn't clog itself on pet hair, but I figured out a good rhythm now.
Smart bulbs in some rooms, automated to dim at night and turn off in morning.
External sensor lights around the house and garage. And internal sensor lights in pantry and deep closet space.
They are small things that you feel the benefit pretty much daily.