Discuss the concept that “It’s not always about you.” Some days need to be about supporting someone else in their joy - or sorrow. Your needs take a backseat.
Begin to teach self-policing. There are plenty of good things that I want them to be able to partake in (alcohol, a trip to Vegas, etc.) but alcohol and gambling are just a few of the things that can sneak up and take hold and RUIN your life if you don’t know how to self-limit. Respect the potential danger and be vigilant. keep re-ticketing and repeat yearly (age-appropriate)
If a girl is drunk she cannot consent. Don’t even think about hooking up when your partner is intoxicated. It’s immoral and illegal. No excuses. No exceptions. . Break this law and you will be (rightfully) charged with rape and you will get sent to prison.
Sadness means you need love. (From another person, a pet, yourself.) Someone whose presence brings you comfort. May be dead, living, fictional, historical figure, religious (god, saints, Buddha, etc.) Live and in person is best though. Let someone love you how you need to be loved.
Say it early and repeat it often, so that it sinks way down deep: There is nothing you could do to make me stop loving you. No mistake, no failure, no decision, nothing. There is no hole so deep that if you fell into it I wouldn’t climb down to help you out of. I love you no matter what.