Because of the kitty cats and the lovely Bobby and Dammit (I've spoken of Dammit before, that's Bobby's tail's name), everything has to be covered or out of kitty spray reach. (Have I ever told you that Bobby is a short kitty, but his spray has been measured at over eighteen inches high....predators feared him, when all they knew of him was his calling card.)
And I have so many paper scraps and extra pieces cut out that keeping the organized isn't easy. I don't have the room. I've been looking for plastic storage bags every so often that might fit the bill. I'm sure you've done that before, thought to yourself "gee, it would be really nice if I could find this" and you search and find nothing. Six months or so later, you search again. I've been doing this for a couple of years now and finally!
As I do projects, I'll label the bag so that everytime I make that project, if I have any leftovers, they'll go into that bag. And the next time, I'll have stuff already cut out! (Like for the carousel, I cut out different colors of the trim so that I'd have a choice, I could mix and match.)