Cook way too much. Make a big pot of Chili for one person: freeze in individual servings. Soups, Meatballs, stew, even grilled foods: Cook enough for an army, have leftovers that week and/or freeze for later.
I have a rolling variety of food in the fridge. As soon as one of the two or three things starts to run out, I replace it with something new. Mom and I have three meals at home every day, which is way way more food requirements than I usually have at home, where it’s just me and I eat out a lot.
Eh just depends. If I make chili then yes I make more and we have leftovers for other nights. Either by itself or used over fries, Fritos or with Mac and cheese. But there are a lot of things I just don’t think save well, or no one will eat as leftovers. Potatoes good, most pasta not good.