Here's a fresh idea that I did back in 2005 when I was a counselor at Lake Forest Ranch. I wanted to do something where my campers that summer could sign their name and I could remember them forever. At the same time, I wanted them to sign something that I could actually USE. I am a big fan of having things in my home be as functional as possible.
My idea: decorate a lamp shade! It was super easy too! All I did was buy a basic white lampshade from Wal-Mart (because that's the only store they had in town :) ) and then supplied sharpie markers.
I love this because now six years later, I still have this reminder of my fabulous summer at camp as a counselor and all of the girls that were a part of that summer. I love this too, because anyone can do this and for so many different situations. Another cool thing is that I did this again when I worked there a second summer, so I can have a matching pair!