Books.
I don't very often buy new books, I tend to get them from a really good second hand bookshop close to where I live. The books there aren't expensive so what I to do with ones I have really enjoyed is to leave a note inside saying 'I really enjoyed this, you might too'.

I'll then leave them in a public place like a cafe, train station or on a park bench for somebody else to find and (hopefully) enjoy.
( Anthropos Was making beer on, Sun 17 Jan 2010, 12:39, 7 replies)

Love stuff like this
Bravo.
(Barry from Eastenders is, despite the words written above, not a woman, Sun 17 Jan 2010, 12:40, closed)

Bookcrossing
See http://www.bookcrossing.com/ - they have a tracking thingy for 'wild releases' like this, so you might get to find out whether the person who found your book actually enjoyed it. Not actually used it myself, but TOH think it's great.
(Photon wasting your time since, Sun 17 Jan 2010, 12:50, closed)

Cheers,
I didn't know this existed, a really great idea!
( Anthropos Was making beer on, Sun 17 Jan 2010, 13:06, closed)

I'm a big fan of found and leaving books
And the best result was a book I found in new York with a note inside saying the owner had bought it from the uk, I read it on a plane on the way back to Australia and left it in the airport... Hope
it took off again! Wish I'd used bookcrossing to find out
( difficultchild, Mon 18 Jan 2010, 9:14, closed)

<3
*click*
( cakelady, Mon 18 Jan 2010, 9:39, closed)

click
ity click
( rofl harris, Mon 18 Jan 2010, 11:21, closed)

Cool!
Duly clicked. :)
( Jimbuktu See? Right here, Mon 18 Jan 2010, 13:56, closed)