1. Playing hand-held video games.
Specifically, playing Pokemon can earn you a bunch of cash to attend school. The Pokémon Company International awards scholarships to the top finishers at the Pokémon TCG U.S National Championships and the Pokémon World Championships.
9. Taking an interest in vacuum coating.
No, not that kind of vacuum. (Pro-tip, Google says it has nothing to do with actual vacuuming.) You can earn over $2,500 by taking an interest in a related scientific field.