J.B.
I've started buying more "Store Brands". Most of the time they're made by the same comppanies and they're less expensive than the name-brand items even when you deduct the price of a coupon.
Keep an eye on how many non-food items your buying at the grocery store. I'm sometimes surprised how much all those extra cleaners and stuff add to my bill.
Also plan meals around what's on sale. I'll make a double batch and freeze half. (It's nice to have a couple of meals in the freezer when I don't have time to cook)
Don't forget to balance the cost of food with the cost of travel and your time. If it takes 4 gallons of gas and and extra hour of travel time to drive across town to save a couple of bucks, it's probably not worth it. I figure my time is worth at least $10 an hour. :)
Most grocery store will give you a 15 cent credit for every bag you bring from home. (think of those 100's of plastic bags that end up in the back of your pantry or in the garbage).