Like most newly-minted teenagers, I thought I was invincible at 13.

I was young -- yes, I knew that, but I was just old enough to believe I had everything figured out. Oh, how wrong I was. Now I wish I could go back in time, even for just a moment, look myself in the eyes, give my shoulders a little shake and say these words...

1. Choose People Who Choose You

You should never have to chase people. You are here and you are important. Do not run after people trying to prove that you matter. The people who really want to be in your life will be there; In return, you will be there for them. It's about give and take. Pour into others as long as they fill you right back up.

2. You Are Not An Island

Don't burn bridges thinking it is self-preservation. Let them be there for you; Let them in. You are meant to need others. Do not live in isolation because you think no one will ever be able to understand. You are not an island; You are the ocean. Let them explore your depths.

3. Say "No."

One word. Two letters. Say it with me now, "No." You will save a lot of time and energy when you learn that "no" is a complete sentence. No. No. No. It does not require explanation or justification.

4. Fall Apart

Let yourself fall apart. You will get stronger and stronger every time you pick up the pieces. What does that say about you, besides that you live through revolutions?

5. Listen

Never be so desperate to be heard that you cannot listen. That’s how you earn someone’s trust and someone’s appreciation - you listen to them. You really, really listen (and then you really, really care).

6. The World Is So Much Bigger Than [Insert Your Sport Here]

I know right now it may seem as if your worth is dependent on your talent in [insert your sport here]. Trust me, it's not. Although it is hard to see now, because [the sport] is your entire life, you are more than an athlete. Of course, you can let yourself enjoy it; Revel in your victories and let failure temper your success. Let it teach you humility. Let it bring you gladness and grief, but do not let it define or limit you, because(spoiler alert) you will do and be greater things.

7. "Courage, dear heart."

This quote by C.S. Lewis will get you through a lot of scary moments. Be courageous as you discover that there is not always a light at the end of the tunnel. Be courageous when you realize it is you. You are the light.

8. It Will Never Be Perfect; Make It Work

The secret is that it will never be perfect, but you can always make the best of it. Never lose sight of what makes it work, of what makes you happy, or of what makes the imperfections worth it: Good literature, laughter, food, family, friends, music, compelling conversation, nature, and art. Look to make the most of your life, so that even when you feel like your world is crumbling, you will never be too far from the tape and glue.

9. Be Kind

Be kind - for it is something that some people can never be.

10. You've Got Friends You Haven't Met Yet

Settle your heart child, you will meet and love new people in every stage of your life. They will fill holes in you that you don’t even know you have. After all, goodbyes always lead to hellos.