I once loaned a book to a special guy in my life and when it was returned to me, this was one of two notes stuck on a post-it on the inside cover.  Who knew post-its could be so romantic?  And one of my live-in boyfriends used to leave romantic notes on post-its stuck in cookbooks where he thought I'd stumble across them.  Anytime I do, they still give me a huge smile.  Don't underestimate the power of a well-placed post-it.  Happy V-Day.