I sure do!
I cook for several night but sometimes still have some left over so put it in the freezer.
I have two freezers - one in the kitchen and one in the garage so as my kitchen one is generally full, and is part of my normal fridge, I put a lot of leftovers in the garage freezer.
AND THERE THEY SIT!
I rarely eat them and end up throwing out which is a dreadful waste....but I do use the freezers!
My husband is a shift worker so I deliberately cook too much to freeze in single serve containers.
This way we can all have something decent to eat when he's working, and we can all pick which meal we'd like.
I have a small chest freezer which I make good use of. I freeze leftovers, sometimes in one portion serves and sometimes enough for the two of us. I also freeze any leftover tomato paste, lemon juice and the like. I try to avoid wasting food.
Marie, Do you freeze tomato puree, tomato paste & lemon juice in ice cube trays. I do, then put them into snack packs or sandwich bags when frozen. I also keep my fresh chillies & rosemary in sandwich bags in the freezer, & my large piece of ginger to grate when needed in a recipe, in a paper bag in the freezer.