Here are a few more:

Not for everyone, but see if there’s a liquidation grocery store (otherwise known as “the dented can store”) near you. A lot of their goods are dented or expired, but a lot aren’t. You have to be willing to sift through, but we get great stuff cheap every time we go, including organic food we’d never be able to afford otherwise.

Use textured vegetable protein (made from soybeans) instead of ground meat in chili, sloppy joes, etc. Or mix it 50-50 with meat. We don’t eat meat anyway, but I’ve read many people who’ve said their meat-eating families couldn’t tell the difference. TVP is lower in fat and much cheaper than meat. You can buy it dry in the bulk section of Whole Foods or another health food store. Just reconstitute it with water or broth when you’re ready to use it.

For health and beauty items, CVS has free items each week and each month with their Extra Bucks program, and Walgreens and Rite Aid have rebate programs with more free items. CVS is a bit more work since the Extra Bucks expire (you can use them to buy more Extra Buck items though!), but Walgreens and Rite Aid’s programs are simple–type in the receipt info on their website and they’ll send you a check (in Walgreens’s case, you can also opt for a Walgreens gift card with a 10% bonus on all your rebates). If you keep up with these, you’ll never pay for shampoo, conditioner, or toothpaste again.