Also keep an eye open for places that are going out of business. There are a few things you can do to save food costs. When buying bread, and other bakery products, look for the day old stuff. Actually, there's no difference. You can start a small garden to produce vegetables, and if you have land, even raise animals for food.
Many books are available on gardening and livestock raising.
It often pays to take a walk around the neighborhood on trash day. You'd be surprised at the perfectly usable, or easily fixed stuff people throw away. As you see, there are several ways one can use less money to maintain a standard of living. What I mentioned here is just the tip of the iceberg.