I sort by general size and then by color. I find the hanging shoe bag closet organizers are great for FQ's and I use the hanging sweater organizers for larger pieces of, say, 1-3 yards. If they are larger, I like to keep them on bolts and just stack them on a shelf. I generally buy muslin for background and backing by the bolt when on sale and just cut what I need each time. I also keep all scraps for applique by color in stacking clear plastic boxes. Having said that, I also keep my Xmas fabs together, child prints together (someday hoping to have a grandchild!) and felts together. I also have a section with plastic zip-lock bags of trims-laces etc. I do like my fabric organized so it makes it much easier to see what I have when "shopping" in my stash for a project. I also love looking at it and feeling it each time I dig in!!!