Our local guild has had a UFO Challenge going for a few years now. We fill in a form to list the UFOs we can reasonably expect to finish during the year. At the guild general meetings, we show the ones we've completed , to applause of course. At the end of the year there are prizes for the ones who complete the most etc. I've completed two of the six I listed. Some are bed-sized, one is getting hand-quilting. I find the challenge to be a good "pressure" to work on things.