You have to adapt your stashing to your own space and quilting needs. One friend of mine folds her long pieces in fourths lengthwise then folds them with a raw end out so it is always ready to have something cut from it. I stash by color and use. Besides purples and greens etc., 2 drawers each, I have sterlite drawers for corderoy, batiks, denim, precuts (which are the 4x4 etc pieces I have processed from scraps) and novelty fabrics, mainly for making charity quilts. I have friends who have massive space in FQs, which does not work for me. My DH was pointing out today that my stash investment is way higher than my machine costs, but at any given time I can ceate several quilts from my stash with little searching. Generally, I know what I have.
BTW, in the last 2 months, because of moving, I gave away several large bags of scraps. When I started quilting, I got several bags from other quilters to help me get started.