To everyone older, what general advice would you have for a 19 year old?

I am 19 years old and am a male. And I am just trying to acquire some general “wise” knowledge from anyone older than me, or advice. You know that phrase, “If I knew back then what I know now…”. Well, thanks to you, I can know now what you do at your age! lol.

I know I am not going to all of a sudden change, and I know that true growth seems to only come through experience its self, but I would say it can’t hurt to just tell me what you think is important or whatever, in terms of just general advice about life.

For example, one person told me, don’t ever let anyone make you feel bad about yourself, that they can only make you feel bad if you allow them to. Something like that.

So again, any old advice at all, it can be specific and precise as needed or just really broad. Doesn’t matter. Please state your age and sex! =D. Thank you!