I also use pizza boxes. Most pizza parlors will give you a couple boxes or offer them a few dollars and they"ll give you a stack. What I do is to separate quilt projects (perfect for up to 12x12 blocks), the binding and a Ziploc bag with my notes in it. The cardboard side lets you write what is in it and they stack on top of the cabinet. Out of the way but close at hand.

Ziploc bags and post-it notes are my go-to's for organizing.