Depending on the size of the UFO and if it has fabrics and/or pieces to it will determine the size plastic tote I put it into. If its a quilt flimsy that just needs to be quilted I have a rod along the hallway in my basement to hang it. As I progress with each project, I'll pen a note to it so I know where I'm at with the project. I also keep leftover pieces of batting on my rod with a note telling me the size so I know whether it will fit the project in mind or if I need to attach another scrap piece of batting to it.