Catholics Come Home has a series of well-done videos that encourage those who have fallen away to take a second look. (h/t Amy Welborn)
The first, "Epic", explores the range and diversity of the Church and the countless good works that Catholics have been directly responsible for.
The second, "Testamonials", features people who have left the Church for various reasons and the peace and joy they have found since returning.
The third, "Movie", gently reminds people that the "movie" of their lives will show the good and the bad, and that it's not too late to have God re-write the movie to a happy ending.