Do whatever you feel like doing whenever you feel like doing it. I always have several projects going at once, sometimes I do a lot of cutting, then piecing, then quilting or anywhere in between. When one projects starts giving me fits, I change projects. I also try to vary what I'm making to put less strain on my arms and back, as I have carpal tunnel in both hands, and I just had rotator cuff repair in my right shoulder done in May. By varying what I do I put less strain on my body parts, and it keeps me from getting bored.