Kaytie Yost sells such interesting organization pieces which would be great for craft supply storage. Below is one for sewing supplies. See more in her Etsy shop, Seelamade.
I just love the craft-studio-in-a-closet idea. Here is another one to peruse from BHG.
HomeKlondike shows this compact fold-out desk that would be great for a small space as well.
See Teresa McFayden's revamped studio space here.