I am not a planner, so I rarely buy all the fabric I need to complete a project. So...when it's a hassle to run back to the fabric store, or I have to wait for a postal arrival, I go on to another project. Right now, I have 3 going at once, plus a fourth is on hold until the "client" chooses her backing fabric. Some others just can't function like that. So please, just do whatever works for you!