If you freeze left overs in baggies, it's helpful to have a cookie sheet, cardboard box or something you can put them on to lie flat while they freeze. It makes for more stackable or fileable shapes. Be sure to LABEL EVERYTHING with a permanent sharpie. Otherwise six months later you'll be looking at a bag wondering, "what the heck is this?" We even label cuts of meat, because some cuts are pretty tough if just cooked like steak. It's also useful, if you can, to arrange your freezer into 'sections', (the meat goes here, the veggies go there, broth and frozen eggs go in the corner, oh, and here, in the place of honor, is the ice cream).
My grandma made excellent pies, with great pie crusts. She made pie crust once a year, dividing her finished dough into balls (one crust per ball), wrapped them in plastic wrap (which she washed and reused) and froze them, pulling them out of the freezer as she needed them throughout the year. Her recipe was lard, flour and seven up soda (I assume any lemon-lime soda would work). I don't remember the exact amounts, but I found a recipe online for 5 crusts that looks about like hers, only smaller (she would make up 50 crusts a year). Here is the online recipe link.
https://www.food.com/recipe/lucies-7-up-pie-crust-idiot-proof-pastry-recipe-42536
When I was single I would cook one batch of food a week, freeze some, put some in the fridge. After the second week I had an 'alternative' to this weeks batch when I felt the need for a something different. (My normal batches were usually either beef/barley stew or pinto beans (sometimes as chili, sometimes just beans), or just hamburger and rice, heavy on the pepper.
When I got married, my wife refused to eat the same thing more than once or at most twice a week. We quickly found as a young family that some things, like meat, were often cheaper in larger quantities, so we would buy it and divide it into meal sized portions and stick most of it in the freezer. We also made food in large batches and froze some meals up for days when we were sick, busy, or just didn't feel like cooking.
With a large family, the need for freezing leftovers minimized, for three reasons. first: with lots of teenagers, there generally wasn't much in the way of leftovers. second: what was left got scarfed when the kids got home the next day or were side dishes the next night, third: my favorite lunch at work is last nights leftovers. A ten pound bag of potatoes was generally about enough for one meal. We still cut our meat (either purchased or harvested) into meal sized portions and wrapped and froze it. (By the way, a roll of butcher paper can give you a great, table sized paper for small ones to draw on, alternative use! You could even save it and still use it with the crayons on the outside to wrap meat.) It was a challenge at this point to freeze up meals. We would still do it, to reduce stress on 'bad' days, but we generally divided it up so that it took 4 or 5 frozen bags to make a meal.
As our family has shrunk down from 11 -13 down to 3 or 4, we have begun freezing food again, in either meal sized or even portion sized quantities. I often find it hard to cook small enough batches, so this is how I deal with 'overabundance'.
I usually boil down our holiday turkey carcass for bone soup. The finished broth freezes up well in appropriately sized portions for use after you've recovered from OD'ing on turkey.