this is what I do. I just keep every single ticket of every single concert/comedy show/special movie/theatre performance I have ever gone to, starting with my very first two concerts when I was a wee lad, which were utwo zoo tv rfk, and pink Floyd division bell rfk. I keep them in fully overstuffed envelopes marked 1, 2, 3, 4, 5,6 7, 8 . . . yeah I think I am on eight now. and I go through them and read them and have nice memories from them. that, is all.