Trade and barter in a grey market.

If you know a trade, you better own a set of tools for that trade. Your services will still be needed but if you don't own the tools, then you're not going to be able to benefit.

Farming tools and stuff to grow food. Bins/water barrels/ soils/ seeds/ lights.

Warm weather gear, tents/sleeping bags/ lanterns, camping stuff.

Canned foods, dried foods, stuff for canning/preserving.