We shoot for very low grocery prices and avoid any thing premade or packaged. Walmart will match competitors prices on most items. So when the loss leaders come out on the flyers that is a good deal.
My best loss leader deals are on meats and eggs. Stores around here put eggs down to $1 on a relatively frequent basis. I stock up with 10 dozen. Recent meat purchases included -- $2 80/20 ground beef lb., 49 cent chicken quarters, $2 bacon, $2 lb real butter.
I think you'll find that stocking up increases your use of items by 20-30% thus negating the savings on many items. I know I eat more meat I bought cheap.
So the magical number you want to shoot for is $2 per person per day, fail and end up around $3. Once you do it for awhile it becomes second nature.
Cook all your dinners and some lunches on Sunday. If your into it make 10 or 20 egg, bacon, cheese burritos on Sunday and freeze.
Some good and cheap meals -
chicken and noodles, Chicken noodle soup, chicken and dumplings, chicken stir fry, chicken and rice, chicken and rice soup. Use the dark meat -- it is cheaper and contains more healthy nutrients.
If you really get into it start looking at price per calorie comparisons --- You can buy 6000 calories of olive oil for 3 bucks. Flour and sugar are practically free when they are seasonally marked down to $1.
You can make a pound of egg noodles for 25 cents. Eggs at $1 per dozen = about 1200 calories per dollar and that is healthy protein and healthy fat.