I always have UFOs and have come to the conclusion that I always will. It's just the way I work. Plus, I've always got more than one project going at a time--fortunately I have multiple machines, but there are always WIPs waiting in line for a machine that's being used for some other project...The UFO challenge is helpful since it encourages me to go through the UFO pile and pick something to work on till it's done.
Rob