I try to just do one project at a time (with some exceptions!).
I do have one plastic sweater container that has 6 or 7 projects just "waiting their turn". My biggest problem I find a pattern that I just have to do right now so I am almost to the point of needing another sweater container. I guess I just want to enjoy the process with every project I do whether it's a table runner or a queen size quilt. Just me!