Duane, you're just gonna have to learn how to split recipes for smaller batches. As for cookies, several companies make pre-made cookies that you just use what you need. 10 minutes in the oven and you got 1 or 24 excellent chocolate chip cookies. I don't usually like leftovers (except lasagna) so I usually try to keep the amount cooked to a reasonable level. It isn't always easy but with practice it can be done.

I got friends who cook up a storm on Sunday, freeze it, then thaw and re-heat for a week. Works for them, but not for me.