Read Release Rinse Repeat
Idea: A random book exchange.
Directions: Read a book. Register it on the website. Leave it somewhere for someone to find. Rinse. Repeat.
No seriously, that's it. Neat huh? When you register a book with this site you tell it where exactly you plan on leaving it (in the real, physical, non-internet world) and a unique ID number is generated. You write that number and the web address in the front cover and release your book into the wild. When someone picks it up, they can go to BookCrossing and enter the ID number to see who left it and what their comments were. You can also enter your own comments and once again leave the book somewhere for someone to find. There are currently over 400,000 books on the loose somewhere in the world so you can look up your city and see if there's one near you. I think I might actually try this. If I don't forget. Which I probably will. So remind me, ok?