When I had a long arm business, I would start a new project if I didn't have any customer quilts to complete. Then here would come a few quilts to complete for others and I would put that project aside. Slack time....start a new project. Start a Block of the Month at the local quilt shop. When you finish the twelve blocks and get the setting kit, there is no rush to finish. Pick up one of my UFOs, here comes someone with the statement, "Can you do a quilt for a benefit auction?" So, I have made a three lists of twelve projects each, including benefit quilts to do during the year. And yes, I work better if I am working on two or more projects on a rotating basis as I get tired of the process, but love the finished product.