Dear Me: A Letter to My Sixteen-Year-Old Self

Has anyone seen this book? It’s compiled by Joseph Galliano and features letters written by celebrities to themselves at 16. Some provide advice, warnings, or merely a play-by-play of what will happen. Some are short, some are long.. I think it’s such an interesting concept.
If I was writing something to myself at 16, I would write that I’m going to go through a tough time and I will lose my best friend (not through death but she will turn on me as teenagers do), but it will be ok in the end. And that I should talk to my mum more about everything and we will end up being great friends. I would say don’t take the promotion at your job, you know you don’t really want it… And there are so many other things I would say.

What would you write to yourself at 16?