This always happens to me - and yes it drives me crazy too. Especially when I am in the middle of one and then I feel there is one that needs to be done before I finish the one I am working on, because it is for some special need, like a new baby or special request from my husband. Because once I set one aside it may be years before I get it finished. I do have several planned but only two that are waiting to be finished. (That does not count the one tumbling blocks I am doing by hand so I something to take when I fly somewhere.) This year I am trying very hard not setting any aside. But it is only March and I have finished 2 since the first of January.