I have begun to cut my scraps in standard usable sizes and put them in the plastic shoe box size containers. I then generally just root through the size that I want to use and choose colors or just pick them randomly. I am always concerned about color this and color that but in the end my favorite quilt is one that is truly random. It is just light and dark half-square triangles but in the barn raising pattern. Love it and the blocks are organized only by light and dark. Take a chance and try a random. You likely will find that it will all work out in the end.