I think of my stash as art supplies. So I routinely use whatever I've got in it. I sometimes have a fabric that just doesn't work with anything I'm currently working on, but I know that eventually it'll be what I'm looking for. That said, I do have a fat quarter bundle that just looks so wonderful I have not managed to open it up yet and I've had it for a year. I do take it out and drool over it occasionally
Rob