I know that fibers aren't as hot as they used to be, but I still love 'em! In the past, I've organized them in big beautiful jars (too much of a hassle to get them out) and one big rubbermaid box (what a nightmare that was!).
I've spent the past two weeks spooling each of the color strands or color groups onto embroidery thread cards and storing them in bead boxes. I have three boxes full and they fit perfectly in one of my Accesorizer Cubes (with a shelf). Now I can take them to crops with me!