I like to "Marathon" cut, then place each individually in large zip-lock bags-marked well and with pattern. I keep them separate and work on them 1 at a time. I am also afraid I would get them mixed together. But I like to have the cutting done-it makes me feel like it is about 1/2 done with the cutting done. If I run across a good sale I may pick up the backing fabric and always put it with the "kit" I plan to use it on.