I use the white mesh laundry bags that are found in the laundry sections of grocery stores. I buy the large ones for projects that are almost finished, the medium ones for projects where the blocks have been cut out and assembled and the small ones for projects that I have only cut the fabric for. With these I can keep the projects in for years and not worry about the fabric fading. I usually will put the pattern and any special notions in the bag along with the fabric. Then I place the bags in a box so that all of my unfinished projects are together in one spot.