@penguindude - I also recommend checking out Into the Abyss by Oz Pearlman, he has a nice routine:
What’s in a Name?
Your spectators will experience you performing the impossible: you will be able to name the person they are thinking of and disclose details about that person that you could not possibly know. This has become Oz’s signature effect in his strolling repertoire. WARNING: Perform this at your own risk! Some spectators will truly believe that you are psychic.
Essentailly, inside a sealed, and stapled envelope is a piece of paper stating the spectator's *thought* of family, or friend's name.