I have two to four projects at a time going. If I get stuck on one project or use Jack (the Ripper) too much, I must leave and do something else. I try to take my time and enjoy the process, but if I find I am becoming frustrated, I get up and do something else, walk outside, plaly with the dogs, etc. I have AADD in a mild form and so have learned to compensate. I try not to have to many WIPS or UFO's. That drives me crazy.
I clean my sewing room as I go, but throw the threads and tiny scraps on the floor. Go figure.