Some time in college I was in a store and noticed some books in the "Essentials" series. They were similar to Cliffs Notes in that they offered condensed versions of various topics. My idea was to have some of these for reference, instead of keeping some heavy textbooks from past classes.
They were pretty good. Unfortunately, the basement of my parents' old place got flooded, and that was back when I still had some stuff I kept there. So these were among a number of other things that got soaked. Of course, that wasn't a good enough reason for me to throw them out. I still tried to dry them out and keep them. They were readable, but the pages were stiff and often stuck together. After finding these in a crate behind my couch this year, I decided to just get rid of them once and for all. I can (and do) find plenty of references on the web for these sorts of things anyway.
I also found another odd piece of memorabilia from my college years: the information on my Sprynet account. There weren't too many ISPs in those days. As a college student I had a free email account and some web space, but still needed a way to dial up the network if I needed to access that from my off-campus apartment. I ended up choosing Sprynet for some reason or another. I don't even know if they're still around. Needless to say, I don't need the paperwork for it anymore. Into the trash you go, paper!
I also found this old speeding ticket from 2001. Why did I keep it? Well I'm a completist when it comes to auto stuff. I have tons more crap like this. Maybe I'll get around to going through it. In the meantime, I think enough time has passed that it's safe to shred this one.