It's hard to believe, but it's been almost 12 years since Laguna Beach, the MTV reality show that spawned The Hills and completely changed the world of reality television, first hit the small screen. While viewers may have initially been drawn to the shows for the beautiful castmates, luxurious locales, and never-ending drama, the real heart of them was the friendship between the female stars and all the life lessons they learned as they journeyed from high school into young adulthood. In honor of the upcoming 10th anniversary special of The Hills, keep reading to find out all the major life lessons we learned from watching both shows. And, of course, don't forget to check out what the cast members of Laguna Beach and The Hills are up to now!