Our guild has a UFO challenge each year. We list one UFO to be finished each month during the coming year. As we finish, we enter our names into a drawing for a small prize and bring the item for show and tell. Some months, we finish none and other times, we finish more than one and can enter our names more than once that time.
If you don't belong to a guild, you can do this for yourself. Make a list and as you finish a project, buy yourself a FQ or some other treat. I keep lists of both UFOs and projects completed. It is amazing to see what I do accomplish, despite the preponderance of UFOs!