Emotional pain is just like physical wound- you can choose to ignore it but it will only fester. Address the pain. Literally talk to it, and listen to it- it’s got so much to say.
Resource: the website Ask, Listen and Learn has great material about how to start a conversation about the dangers of under-age drinking. asklistenlearn.org
There’s an art to speaking harsh truths in a delicate way. There’s an art in describing a ridiculous person or thing without being insulting. Mark Twain was a master at it. Read up!
Sex: There's no single way to do it "right" but there are lots of ways to do it wrong. Not being respectful and tender towards your partner is usually at the root of "wrong" ways to do it. Also, there is no rush. You may think all your friends are "doing it." They're not. Take your time.
Stuff is gonna happen! They will make incredibly stupid choices and get into all kinds of trouble. Take a beat. Be radically merciful. THAT is what they’ll remember and that is the lesson they’ll learn.
Practice “doing without” (or “going without.”). Even young kids can learn the concept. Nobody get everything they want. Sometimes it’s harder than others, but it’s not the end of the world when we have to do without something we want.
There will be many times in your life you feel powerless. What makes you feel powerful? For me, it's a good run, listening to good music with the volume on high. Prayer reminds me I'm connected to God, who is powerful beyond all measure.
Have them sort change, and eventually to count it. It teaches them to gather things that are alike, it's an introduction to money and it occupies them for 15 minutes! Just make sure they're old enough to be past the point of putting coins in their mouth.
Major life events such as the birth of a baby, graduations, new job, (lost job) are a big deal. Make a fuss. Take an interest in loved ones’ experiences. Acknowledge their feelings. Express a sincere interest in others (young and old) will profoundly affect your relationships.