I've been using the leader and ender method of sewing
http://www.quiltville.com/leadersenders.shtml so I use all my scraps, even the tiny pieces. When I saw how much yardage I had in my scrap pile after the scraps were sewn together I realized how much money would be wasted by not using the scraps. There are beautiful scrap quilts to be made after the design quilts are finished.