Prioritize having experiences over having possessions. I spent all my money as a teen going to concerts and music festivals and have zero regrets.

Treat your friends well. A decade from now, it’ll be a lot harder to make new ones, especially if you haven’t maintained the friendships you had when you were younger. At the same time, friendships don’t always last forever, and people change; don’t keep pouring energy into someone who’s pulling away.