Karen, I keep it on an Excel spreadsheet with full info from when I got it, by whom, price, size, etc. So it was easy to copy and paste it. Also keep pictures of when I got it, and every so often an update. I do this because I have to. No memory what so ever. After retiring, got to do something with the computer. Should see my trading list spreadsheet. Every plant I gave to and who and address, and every plant I got from who and when.
At work back in 2008, I kept tabs on every purchase I made, every piece of equipment we had, a print, part list and routine form. I made my own starters, kept up-dated and renewed parts. I really miss that.