There are things you should not say:
Never comment or ask a woman about her age or weight.
Never comment on how many kids someone has (or doesn’t have.) The size, timing, composition, etc of someone else’s family is not your business to weigh in on. You never know who is struggling with loss or infertility, etc. And if someone announces they are expecting their seventh kid, the only correct response is “Congratulations” “How are you feeling?” etc. Just like you would if it was their first. Never ask someone how much weight they lost. If they’ve lost weight, just say “You look wonderful/amazing/ fantastic, etc.” And of course never comment on anyone having gained weight. Just say “You look wonderful.” And never never never ask someone how much money they earn or how much money they have, or how much they owe or paid for something, etc. People’s finances are personal, and are just not any of your business.
Ask “Is there anything you want to get off your chest?”
Confession is good for the soul! Get in the habit of being a place of support when they screw up. Then when they’re older and REALLY screw up, they know they can trust you to help.
Technology doesn’t remove the expectation of good behavior. Be mindful of your manners (and all of our collective humanity) when posting on social media. And no anonymous trolling.
If you’re not prepared to sign your name to what you’re putting out there, that’s a good indication you shouldn’t be doing it.
Grandpa didn’t drink coffee, but when he was in Korea he used to drink it just so he could hold the cup and keep his hands warm. (During the Korean War be enlisted in the Marines with a bunch of his buddies right after high school.)
Career is so important to your life satisfaction. Do what makes you happy. If you’re really at a loss for what you want to do for work, then go where you’re needed.
Venting is crucial but not always appropriate. Make sure you’re in the right place (no chance whatsoever of being overheard), the right time (take care of business first) and that the person you’re unloading on has the mental bandwidth to listen to you vent your emotions. Avoid interrupting if they’re busy, or not in a good headspace. You’ll know this because you asked.
Things are rarely perfect, but things that are less-than-ideal aren't all bad to the same degree. Let's talk about making buckets for "not ideal but I can put up with it" and "deal-breaker." Works for all kinds of situations. Another variation of this is to grade the suckiness of a situation on a scale of 1-10. Have them decide at what point action is needed vs. just putting up with it. This one works well for hunger. Yes, you're hungry, but on a scale of 1-10, how hungry? It also works for relationships! There are plenty of things about a spouse that are less than ideal, but how many are true deal-breakers? Teach them to understand the difference.