The Red Cross recommends having 72 hours' worth of materials. Typically after that duration there's other supports coming and it's now a real crisis!

Remember, you're not actually going to starve within 72 hours, and a wasted fridge full of food is a small price to pay.

Know whether your furnace and water will still work in the event of an outage. If they won't, have blankets handy and fill the tub or buckets with water. Setting aside some in clean containers for drinking is nice. Bring in fuel for the fireplace, if you have one.

Fuel for BBQ (don't cook with gas in the house!) in case you need to cook a freezer full of food. A fuller freezer will stay frozen longer than an empty one. Avoid opening the fridge door to get things. A camp stove could be handy to use also outside.

Canned goods and other foods that don't need heating/cooling. Nuts, fruit, PB&J, spaghetti-os, tortilla chips and canned chili, etc. It's always good to have some of these on hand anyway.

A crank radio and crank flashlight. You can use your car radio, but that's chilly!

Backup battery charger for your phone. Try to use other devices and entertainment sources instead. Your phone is a valuable lifeline.

Lights: candles are cheapest but obviously not safest! Solar lights are great!

Shovels and road salt handy

Stock up on medication, pet food

If you have houseplants and no heat, cluster them together and cover with a blanket or tarp. If you have a fish tank, cold water has less oxygen. You can heat water on a BBQ or blow into a tube to aerate (that one's obviously much tougher!!!) You can also wrap the tank in blankets to retain heat longer.

Also, a car kit!!! And make sure you always have lots of gas in the car. There's tons of checklists for what should be in your winter car kit. They actually save lives.