A helpful idea to share quickly. I've begun accumulating test pieces and samples to the point where I can't keep them straight anymore. Enter my test binder:
I took an old binder, and filled it with baseball card sleeves you can get at your local hobby shop or Wal-Mart (try the hobby shop first). Each glass chip goes into a sleeve, with the back of a piece of 3x5 notecard. This gives an even white surface for viewing the samples, and the lined side of the cards has notes on what the sample is. Right now I have a description and, when relevant, firing schedule for each piece recorded.