I have two tall plastic laundry hampers by my cutting table. I fill one with light fabric and one with dark fabrics. The med. tone fabrics fall either light or dark, no overthinking it or I'd have a dozen different hampers. I can grab one scrap from each and know they will work together. Those two hampers fill up fast. I take them to guild every now and then and dump them on the tables for everyone to pick through. The hampers never seem to get or stay empty. My rule for myself is not more then the two hampers full of scraps. Fabric scraps compact easy!