I have a lot of UFO's. Each one lives in it's own plastic box. I like to choose a month and only work on UFO projects. Sometimes I work on one until I'm tired of it, then I rebox it and switch to another project. The variety keeps me working on them. Last years UFO month resulted in 6 or 7 finished projects and many more that are closer to completion. I'm a substitute teacher, so I usually choose a summer month for my UFO month.