Everyone has their own method of storing, but I think we sort very similar. I sort mine according to color.
Separate stacks for children, Xmas, etc.
So if I am going to need fabric for a childrens quilt, I can go right to this stack.
I want organization so when I need fabric for a quilt I can pull the fabrics with the least amount of time.
I want to spend my time making quilts. Not sorting through stacks of unsorted fabrics.
If I had to do this I would be out of the mood by the time I found the fabrics I was looking for.
When I purchase fabrics for a specific quilt I keep them together with the pattern so I don't pull this fabric from my stash accidentally. This makes it easy to see what fabrics I have and what fabrics I need for this specific quilt. :0)