Brittany Karlen learned about this business literally at her daddy's knee: when she was six, her parents traded in their high-stress real estate business for network marketing, and she recalls being "bitten by the acting bug" climbing onto the stage at her father's meetings. When she turned 18, she took the reins of her financial future into her own hands, building a full-time networking business and a straight-A average in college at the same time.