I have a lot of UFO's. Some are ready to quilt, some need to be finished piecing. I have made a rule for myself this year. I have to finish 2 UFO's before I let myself start something new. I have done pretty well. To finish all 15 of your UFO's before you start anything new is too harsh on yourself. Try to finish a couple then something new. Good luck. My UFO pile is getting a lot smaller. :-)