I think your organizing system has to be a relationship between the size of your stash and the way/type of quilts you make. I have a 30yrs old stash, which covers a 12 ft wall 6 shelves high. Anything less than a full FQ goes to the scrap bins. I am cutting them via Bongs method of strips and squares and storing those by size. When I need a quick block or small baby quilt, I grab those drawers first. As for the shelves? Batiks are with batiks and I have baskets of fabrics sorted by color and some of my smaller collections by type...Asian/blck/whites/gray prints/landscape fabrics/30s repros/holidays, etc. I am TERRIBLE at not putting things back as projects end and that is my greatest undoing of organization. I get so excited about the work and the creation and the tidying up gets lost in the whirlwind. But this year a move is on the horizon, so that will have to change and soon!