Working Poor

The crock pot to cook tougher, cheaper pieces of meat until they're edible, and the chest freezer to be able to take advantage of deep sales and stock up. (Even those pieces of meat that are otherwise expiring the next day and have that 'manager special' discount.) Try to avoid over-carbing, because your body processes carbohydrate calories quickly, and you get hungry again sooner. Adding a bit of fat of some sort will help stretch feelings of satiety, so don't feel you have to always remove all the fat before cooking meat.

And this is not advice, but an observation - I don't throw out canned foods just because they're past their expiration date. Unless they bloat out, or they smell, taste, or look bad when I open them up, I've been known to eat them up to 2-3 years past expiration with no ill effects. But I'm not going to advise anybody else to do that for liability reasons.

ETA: Some of the 'prepper' websites can actually have some decent advice as well, as long as you ignore the blather about guns. And there's a good series of blog posts over on daily kos on 'foraging', recognizing various edible plants that might be growing nearby that you can harvest from public lands.

try https://www.dailykos.com/news/foraging, or https://www.dailykos.com/news/frugal or https://www.dailykos.com/news/survivalism for good posts.