Don't lie to your parents, you'll get caught. Don't sneak out, you'll get in trouble. Don't do drugs, you'll end up in rehab and lose your friends. The momentary thrill wasn't worth it in the end.

 Even though you had done it so many times before, the last time you snuck out resulted in the loss of your innocence. It changed everything.

 After he cheats, break up with him and stick to your decision no matter how much it hurts. Don't give him a reason to ever turn it around on you.

 She may be your best friend and get all the boys now. But you will get the best one out there soon enough.

 It's okay to say no. You have to learn to say no, because all those people who you think have your back really don't. And don't rock the boat with your real friends over something stupid, even though you know they'll come back.

 Don't give up on journalism to get pregnant like your friend and validate yourself to people. Having a baby is no fairy tale, you're going to miss out on something you really love, and those people don't deserve to be in your life. Period.

 Yes, boys are stupid. They're going to make you cry, lie about you, and try to control you. But don't worry, the perfect one for you is where you least expect it. Yes, he'll still make you cry, but he's still going to be there to brush away the tears. Trust me.

 Don't try it. I know you think it will numb the pain, but it's so temporary.