Experience

Experience is more than just live something, it's what you'll learn from it.  When you get older, you start understanding the things your family have told you, this learning is life. I'm not writing because I'm old enough (because I'm not), I'm doing this because every mistake I make my relatives come to tell me what was the right thing to do.
You need to learn from you, but sometimes do not need to live a moment to understand it, it's  amazing. Don't be mad when the things don't get fine, tomorrow is another day and other mistakes. Because life is learning and learning forever.