Sometimes it's the little things you need:
Rubber boots, gloves
Battery or hand cranked radio
Board games or something to occupy people (especially the kids) with now that they can't watch the boob tube!
Yard tools
Gas shut off wrench
Extra fuses
UPS on computer equipment
Powerbar /w overload protection on other equipment

Stuff in the freezer should be good for at least 24 hours (don't open the door to check either!) but stuff in the fridge definitely needs to be consumed or tossed.