Philip and I watched Yes Man recently. While I don't think it will go on my list of all-time favorite movies, I found the premise incredibly powerful.
Jim Carrey stars a Carl, a lonely divorce who has alienated those around him. He falls in with a cheesy self-help program and begins to say yes to every opportunity before him. Before you know it, his life has changed.
While predictable, the movie does make you look at your life and wonder how your attitude shapes events around you. I think it may even make me say yes to more of the opportunities that come my way!