If my pattern doesn’t name each piece that I’m cutting I’ll mark the pattern with an “a”…”b”…”c”…and so on. Then as I cut my pieces I clip a small of piece of paper to each stack (i use those small or large clips we use instead of pins…what the heck are those called??) with the corresponding letter to mark each stack. If I’m not sewing the quilt right away I stack them carefully in a flat box - like a pizza box - to keep them organized.