Make origami storage boxes from old movie posters.
I had a box of movie posters from the 90s that were in less than perfect condition and a need for storage organizers. The movie posters are printed on a heavy paper. So I knew this would give them the strength and durability needed to make origami storage boxes. You can find the directions here- http://www.origami-instructions.com/origami-box.html . They can be made in a variety of sizes, just as long as you start with a square. I used mine to keep some of my art supplies in.