I keep mine in the following categories: Christmas, Halloween, flannel, baby prints, and the rest is sorted by color. Most of my fabric is in quilt kits comprised of jelly rolls and yardage to match. I also have quite a few Charm Packs.

I have mine organized by length of cut and generally by color within that. All the fat quarters are together and arranged by color, all the half yards are together by color, and all the yards are together by color. All of those cuts go in dresser drawers. Anything bigger goes on foam core boards on shelves and they're mostly arranged by color. I have several groupings of fabrics that I keep together though.

I think stash storage options are driven by the size of the stash and the type of storage available. As your stash increases (or dwindles), other options may make better sense. The key is to organize the stash so that you will be able to find what you want, so you will use it, decrease the stash, and make room to store more. :)

I organize ruler fold yardage (most of my stash) by dominant color. I do have several bolts (white and black) that I just leave on the bolt stored on a shelf with my other solids. Flannels and holiday are separate. I have very few bundles (fat, jelly, charms) but they are stored separately as well. I really need to figure out something for fat quarters as currently they are stored in a container with no rhyme or reason to it. I have smaller containers for spare squares and blocks (left overs).

I have a box of Christmas, kid prints, flannel, oriental, 30's repro. Anything over 1/2 yard I ruler fold and store by color. Anything under 1/2 yard is in a box by color,.... red, green, blue, etc. I don't do fat quarters, charm packs or any of that. I hang strips by size (1 1/2", 2", 2 1/2", etc.) And I have a few bolts of fabric. I don't think my stash is huge but it's a good size.

I use plastic totes. I organize by color, but since I have quite a bit of fabric, i break it down by small pieces vs. large pieces, for instance "Brown - Large", "Brown - Small." I also have separate totes for solids, Christmas, Halloween, batiks, wool. Then I have a giant tote for multicolored pieces.

My tonals are sorted by color and the rest by the type of prints they are such as watercolor, plaid, Xmas, reproductions, etc.

I buy for projects and stay in the same line so I just keep my project fabrics together

I have some wonderful cabinets to put my fabrics in Pieces larger than 4-5 yards are stored in one cabinet, Florals/Asian, in another, batiks are separate. Christmas fabrics are together as well as fall fabrics. The childrens prints and animal and military fabrics are separate. FQ's are in drawers and the rest pretty much is sorted by color. I fold my 3 + yards over a 6" ruler and the 1/2 yd to 2 1/2 yard are folded about 4" wide. So I know at a glance If there is enough for borders etc. I do keep coordinated fabrics together if I am planning on using them together. I do have some (about 8 totes) "overflow" fabrics. Most of those are really large pieces. Oh, and all the flannel is separate from the rest.

Thanks so much for your ideas!