As of Tuesday, August 30th, I will be twenty-one years old. In the scheme of life, this is the most important birthday I've had so far, and not just because I finally have a sideways license (thanks, New Jersey). Twenty-one is the age when you're officially an adult. And while paying for insurance and trying to find a job before I turn 22 terrifies me, I feel like I've got it at least a little bit together. So here are 21 things I've learned before I turned 21 that I'm now passing on to you.