I put everything for the project in a jumbo zip lock bag, with a note of what still needs to be done. Then the bags go into a plastic tub under my machine cabinet (by my feet) I found if I put them on shelves or in a cabinet they remain UFO's. By storing them in the open tub at my feet I will intermittently pull one out and work on it between working on my current project. Sometimes my note might say "20 blocks needed, 14 done, 6 more needed." Then when the mood strikes I might make 2 more blocks and change the note to say "4 more needed and borders", etc. Sometimes I even work on one because of its color. Maybe I'm tired of working on my current brown project and want to work on something red or yellow that is more cheerful to me that day. Sometimes its just my little self imposed guilt trip so I pull one out and just work on it for an hour. Having them organized and at my feet is what works for me.