When a project starts to go south on me, I put it away in "time out", then I pick up or start another project, so I have several projects going at once. I also go in spurts, last fall I made 12 Bow Tucks bags for a craft fair, then had to do some regular quilt piecing for a change, but then I'd get a call to make another bag, and I can't afford to turn down the $. I tend to switch off to different projects according to my mood, or especially if I'm having trouble with the project.