I have a pad that my machine sits on which has an overhang that has pockets on the front. I use batting scraps as my leaders and enders, so I just cut strips of batting about 2" wide, fold up the strips, and put them in a pocket. When I snip off the used leader, I place it in the pocket next to the unused batting so it is there when I need it. When a used leader becomes full, I toss it, snip off a new one and continue sewing. I don't use fabric scraps anymore.