I try to do one at a time; but you all know how that works. My mind is always working ahead on the next project. I usually will make several quilttops, then I will long arm quilt them one after the other. This past week I finished up all my UFOs (a half dozen) and am now ready to forge ahead on a new batch. When I have more than one going at a time, they are in different phases of construction. I just finished a bunch of squares, and am waiting for the backing fabric to arrive; then I will assemble it. In the meantime I am making pillowcases for a charity for Christmas giving. Am also waiting for a kit from QFK to add to the quilts I already made.