Although I have quite the collection of small thank you tokens which I have kept every one of them , I can tell you where, when and why for each one. Many have a heart felt stories to go along with them. I have one from a M.A.W guest. I really got to know her in the ten minutes I got to talk to her. I will cherish it the rest of my life.
To complete a cast compliment, you just need the location you were in, the date, the first name and hometown of the CM. Many people will take a picture of their name tag, it makes it a bit easier to remember.