Intuition with Cards - the magician and spectator both select and sign cards. By doing the same motions at the same time not only does the magician find the spectator's signed card but the spectator find's the magician's signed card (I don't use the pencil dot, but instead use a different method).
Ewphindit - In an attempt to find the spectator's card, the magician finds the wrong card, but the spectator saves the day by inserting the wrong card randomly in the deck to find their card (I use this as part of a routine, I don't think it is strong enough to stand on its own).
I also Poker Player's Picnic, Do as I Do and Designed for Laughter.