I actually find the processed crap to be pretty expensive. Thinks veggies, lentils, beans, and grains, with meat being a treat or "side dish. Plan your meals and grocery visits in advance, preferably a week or two at a time. Buy dry goods in bulk. Plan your meals around grocery sales (esp. on meat) and coupons. Freeze leftovers and/or get some lunches out of them. Don't throw fresh food away; use it creatively before it goes bad.