Charge all of your devices a few hours before. If you have any of those emergency power bank things for your cellphone, charge those too.

Turn up the heat so the place gets warmer than normal. If the power goes out, you'll appreciate it being warm longer.

Have flashlights with batteries or equivalent lanterns and know exactly where they are so you can grab them in the dark.

Have food options that don't require using the stove or opening the fridge. Think peanut butter and bread, or crackers, bag of chips, popcorn etc.

If you have a wood or pellet stove, make sure you have wood or pellets.