I never do this. I always seem to finish piecing whatever it is that I'm working on before I move on to something else. Where I have a back log is when the finished pieced tops go into the next room where the long arm is. I'm not comfortable with my long arm yet, even though it's been over two years, and I procrastinate forever over quilting them. I currently have 8 quilts waiting to be quilted. I stack them in an old cabinet that has glass doors. That way they are always looking out at me to remind me that they are still waiting. Poor things.