Use extra purchases to stock a pantry for those times when money is very tight. Buy herbs and spices, one jar a week. Soon you will have a variety from which to choose. Use inexpensive cuts of meat such as pork shoulder and breast of veal in stews or stove-top casseroles. Add different kinds of beans and grains to soups and stews instead of meat or in addition to small amounts of meat.
Eggs are inexpensive, high in protein, and can be cooked quickly in a variety of ways.
The only rule is to always cook them well. Keep potatoes, carrots, onions and garlic on hand. They are inexpensive and can form the foundation for countless soups, stews, and pasta dishes. Check out local meal programs and food pantry programs. Cook with a friend.