I use Ziplock bags to store like colours, then keep them in plastic tubs, and have a storage bin of UFO's/PiW, and a rollar tub under the bed with jumper/sweater WIP's. Oh and a Paper gift bag of current projects that gets rotated with my backpack (I think I've got most of them now. I hope.)
Currently my stashgan yarn is teasing me. 2 more days, 2 more days.
Oh no! two more days and my stash-busting rules kick in! must buy now while I still can!
In the mean time I have a garterbloodyscarf to try to get finished. *Sigh*