organize construction paper in plastic files. Keep scraps in the green hanging folders that separate the colors. Crates also work. This makes them stackable and portable. Wonder if there is a product to do this with for larger scrapbook paper.
Use a magnetic board and favor tins to organize small things vertically. I'd like to put my spices in the tins, to save space in the kitchen! This link includes lots of great craft storage ideas, including using closet organizers for craft supplies.