Mine are standing up in 5 gallon buckets along one wall. At one time they were somewhat organized by type (sq. tubing up to 2" in one bucket, solid round stock in another, etc.) Now it's just short of being a disaster. Reorganizing it is one of those jobs I hate---where you have to spend considerable time and effort just to get back to zero.
I've also given away 50% rights to truckloads of usable steel (one of rebar, one of misc. scrap) to two friends in exchange for letting me store the material on their properties. I wouldn't be surprised if time revealed that I've actually given them 100% rights to the steel---I haven't been to either place in years.