I use plastic ziploc bags and plastic boxes. I have way too many UFOs. A friend said when she got to that point she wrote each one on a slip of paper, put them in a container, and drew them out one at a time. Then she wrote them down on a Master List in the order she drew them. She then started in and worked on them in order. It kept her focused, made her realize how many she had, and made her get to ones that she had forgotten about or had lost interest in.
I think this will be my goal for the new year!