Regrowing food from scraps. One thing that's not on this list is leeks and green onions. Use what you need and leave an inch (for green onions) or two (for leeks) at the base. Stick the base in a bit of water and watch it start growing back by the next day!
If you have an area in your basement that stays cool all winter long, you can make use of these cold spots to keep storage crops fresh well into winter. Try experimenting with growing some of these keeper crops for winter food storage.