It is still not really clear... but I would say try to not sleep with your subordinate/professor/teacher/yoga instructor (anyone who is legally having “power”/“supervising” you) - even if you really like him. It will cause him more harm than to you but your reputation might also be armed. But it could also backfire. Those are tricky legal situation I would recommend to avoid. Also don’t sleep with underage man, even if they are 17 and you are 18-19. Not good either.

Of course, Do not kill anyone, do not beat up anyone, avoid borrowing money and debts, do not steal, pay your taxes on time and inform yourself about what you should.

Avoid the excuse « I did know this » or « I thought I could give it back ».

Ho, big point - have a good health insurance coverage to avoid being indebted if you leave in a country that doesn’t provide universal health insurance. You never know when you break your legs on the dance floor on a random night (speaking from experience here) and those kind of accident can cost you up to 5000$ in the country where I leave.

Ha and don’t get married early or for helping someone out with visa - getting divorced is actually a pretty tricky business.