I had a friend and my DGS help me organize my sewing room, then Christmas came and it needs to be organized all over again. I, too, have a donate, maybe and keep pile when I go through the fabric -- the challenge is not to think of uses for the donate pile before I donate.
I opened a lot of cardboard boxes from our move in 2014, putting some of the fabric in plastic totes and some in the sewing room. I also found some of my thread collection (and it was actually in a box labeled thread-LOL).