I tried cutting my scraps into certain sizes, but when I needed a specific color for a scrap quilt, I had to sort through 6 boxes to collect all of the blue scraps. Now I keep 2 drawers of scraps in the sewing room dresser. When a certain color gets too full, I will pull pieces out and get to sewing up a pet bed for the local shelter. I've also decided that I won't keep anything smaller than 2.5 inches or any triangles. My backing and my bindings are frequently scrappy, so that helps keep things under control.