I'm not going to lie, I was totally unprepared for starting my thirties. The twenties are a time when you can't help but feel invincible--you know everything, you're in complete control of your life and the only thing that could derail it is if something dramatically changes. But once you enter your thirties, the truth hits hard: all of those things we thought were true? They weren't. And it's during this decade that we learn some of the most important lessons about how to live our lives. Here are five life lessons I wish someone had told me when I was 20 years old