I've been through many storms here and I never stop learning. A few little things that saw us through nine days of no heat, no gas stove, hot water, or electricity:
Buy instant pudding mix, different flavors. Uses up the milk and no need for cooking.
Get down comforters/sleeping bags and coats on sale or better yet, clearance. The coats work nicely during the day and the comforters work great at night. Down retains body heat.
Solar and/or crank radios and flashlights.
Keep bottled water in the warmest part of the house. Use to bathe with. Icy cold showers are the pits. I swear my scalp stung for hours later. Baby wipes can only do so much after the fourth day....