Flashlights with extra batteries, matches, candles, tea candles with holders
Oil lamps with extra lamp oil. Almost all of the oil lamps I got were thrifted.
Hand crank radio with flashlight
Ice chest/cooler, if you lose power.
RX's- Keep your some prescriptions filled.
Coleman (or other) camp stove oven, propane heater, propane tanks, various sizes
Kerosene heater, several kinds
5 Gallon water jug (camping), Water purifier (for camping)
Canning supplies like jars, lids and rings. Things like Fruit Fresh to keep your fruit from changing color, Fermenting supplies
A freezer, we have a small chest one that works great! For two people we can put a lot of food in there.
Solar charger for phone/devices
55 water barrel (can use if not frozen)
Vacuum sealer system. Great to prevent freezer burn and can also use for dried goods that you want to make really airtight.
Radiant/fan electric space heaters (if furnace died)
So if you're interested think about it and start small!