One thing I enjoy doing is a little activity that I call "Library Archeology," that I do in -you guessed it- the library.

Call me a nerd, but I enjoy reading all sorts of textbooks for fun. And more often than not, I find interesting pieces of paper left in between the pages by the previous borrower(s), which were probably used as bookmarks.

The papers in question can be fascinating. 2008 concert tickets, receipts from the 80's printed on dot matrix printer paper, old homework scribbles, I've seen them all. I haven't found money yet though.

The next time you're bored at the library, give this activity a shot. Find an old book that looks to have been borrowed a lot and check its contents. You may be surprised on what you will be able to find.