When I first took over my big (15' x 25') room, I had everything arranged and sorted. Three years later, everything is still arranged, sorta. I tried arranging my stash according to colors sizes etc. but that was a waste of time after awhile. When I go thru the stash to pull out fabric for PP etc, I take out many pieces to see what works together. Of course, they don't all get put back cause I'm in a hurry to got to something else.
Right now I am clearing the decks, but fabric is still not sorted. The way I have it stacked in my cabinets, I can sit back, scan the whole thing and usually spot the two or three colors I want. Saves time cause I'm not going to put them back where they go. Sometimes, I'll see a fabric stacked on top of another that I thot would never work together but realize they look good together. A bonus.