[QUOTE=Jo Belmont;7199107]First of all, I place all my cut pieces flat on an inexpensive paper plate with the piece ID written on the outer edge of the plate. I can then stack them and put them into a clean produce-size plastic bag and when returning to the project, I'm able to take out from the stack only those pieces needed at that time.
I use inexpensive generic coffee filters if the pieces fit closely enough. Then I put the each project together in one bag, box, or just folded together in my cabinet. Now I even put a post-it with what the project is or the pattern ... especially important if it is just the fabric. [I once found fabric for a project but without a note or pattern. So, it became part of my stash.]
I've used coffee filters at sew-ins for holding cut threads and such.