I separate the layers and use the leftovers as many have noted above - if the scraps are quite small I cut into 2 1/2 " squares. Anything smaller than that I put into a bag for a friend if it's at least 1" square. The smaller bits go into a bag for stuffing dog beds. The batting I am not as conservative - if it's large enough to join using a wide zig zag or I can use for potholders or bowl cozies I keep it. The smaller pieces go in the dog bed bag.