I'm similar to LeeU above. I find putting painters tape on the bottom with a code helps keep them straight. That number is duplicated on the carton if I have it boxed and ready to ship, the spreadsheet I take to the show, and On-line. While I do low fire (horsehair and saggar) that have a "fingerprint" quality to them, it is much easier to pull out the item with a number. It was my wife's suggestion very early on but I was foolish enough not to listen to her for a while.