I too sometimes take a LONG time to finish a quilt, so I always have 2 or 3 works in progress. When I'm working on a large quilt, I'll get tired of looking at it, so I switch to one of my other projects for a couple weeks...eventually they all get done. They key thing is to make sure you quilt at least once a week - getting into a habit of at least 30 minutes daily is better.