To start with there are no quilt police and I don't like other people telling me how things should be done unless I ask. That being said I have three things going in different stages. Sometimes I run out of something needed to finish it and sometimes I just want to give my mind a break and work on a new thing. I have vowed not to start a fourth until these are done so we'll see how it goes. If I like what I'm doing I can work on one thing until finished. I usually work at least 4 hours at a stretch. Take a break of an hour or more and maybe 3 or 4 more. Depends on the day.