Good way to make sure I'm not just eating grilled cheese sandwiches all the time. And to possibly avoid the need to run to the shops every day. :-) But then I often only have the money/brainpower to worry about what I want Right Now and am likely to go 'oh, a pizza, that'll work' and run off again, only to have the same conundrum the next day.

That's something else I want to think about properly, eventually: how to get my food without destroying my sanity/the environment/the lives of the people who grow it...