[jf271]

I the US I can think of two.

Number one: you are in charge of you life and education. Don't depend on teachers to teach you everything or the government to guarantee your happiness.

Number two: learn to accept criticism and act on it. You won't get much of it during your years in school but you will get it eventually. It isn't the worst thing in the world and you might benefit from it if you don't just react against it.