For me, the answer is plan ahead. I have a large chest freezer in the basement. By November, I was feeling like I had "All the food." It was stuffed full. I bought 4 or 5 bags (10lbs each) of potatoes and spent a week cooking them and freezing them. Also lots of bags of frozen veggies, some prefrozen like Green Giant and some I did myself from fresh. Also in the fall when a lot of the meat is on sale, I got lots of chicken, ground beef and pork. I also bought 3 turkeys at $0.79/lb. Cooked them and frozen some of the meat. The rest I made into soup, lots of soup, and other things too, in the crock pot, like hamburger soup, chili, spaghetti sauce.

All of this was a lot of work and more expense in Sept, Oct, and Nov.but now I can spend less than $100/week on fresh groceries, (that's with my food too) and the freezer is still more than half full.