I'm planning on one of these (third one down) to use up some scraps. I'm going to use 4.5" x 12.5" pieces of muslin and then just sew scraps onto that:
http://cvquiltworks.blogspot.com/201...-giveaway.html
I think I will keep my scraps fairly vertical, and I'm going to alternate the scrappy blocks with a solid sashing, so the layout will be a little different...