Tell HN: I'm 18 years old today

However tempting a crime might be in your future, do not go down that path. It is better to be poor and free than rich and looking over your shoulder.

Budget. Time is on your side for building wealth. Start investing 15-20% of your salary passively in to the stock market in the most tax efficient way possible. Do it and don't look back. Don't lose faith.

Start thinking about where you want to be when you're 30-35 (wife? Kids? Career?) because you'll be there before you know it.

Your brain is still growing and changing with much more ease than someone who is 25 or older. So use these years where you can quickly learn and adapt well. But the other side of that coin is that you aren't emotionally matured yet and will look back at your actions in these years with much different eyes.

Don't stress too much about your education or career. Procastinate doing things you find interesting, but at the same time strengthen niche skills. Party now, when you hit 30 the hangovers will most likely be unbearable and take too much time. Live in a dorm and travel abroad alone, this will let you meet people you wouldn't have otherwise. Go to festivals. Have one night stands and non-binding relationships. Make mistakes and do stupid stuff, you will learn from it. Be a part of a subculture. Try not to hurt peoples feelings. Be nice and people will reprociate. Have fun.

Exercise a lot. Don't work too much.