"Watch the pennies and the dollars will take care of themselves." - Ben Franklin
This works with money and with other areas: Be faithful in the little things and the bigger things will take care of themselves. For example, if you don't get comfortable with telling little lies then you'll never tell big lies.
Mindset for a breakup: “I’d rather adjust to your absence than be continually frustrated by your presence.” Can work with romantic partners, jobs, habits...anything you’re hanging on to that you know you should let go of.
You can’t grow in faith (or character or friendships) without learning to be humble. To forgive. To listen without agenda. To allow for the possibility you may be in the wrong.
Ask for help. God will give it.
Talk about how to be a good houseguest: Always bring something (food, wine, gift, etc) Make your bed, keep area clean. Enthusiastically accept your host’s hospitality but don’t make extra work for them. Contribute and pitch in where u can. Send a thank you note - or at very least, an email!
Put a few drops of tea tree oil in their shampoo bottle to keep lice at bay. If there’s a outbreak at school, add more. (Or spritz their hair with a tea tree oil solution.)
Discuss prescription (and OTC) medications. Doctors prescribe or recommend these medicines, they’re not for fun and should be taken seriously.
Discuss how medicines are obtained, never shared, which is dangerous and illegal.
Emphasize the risk of dependence.
Read BIOGRAPHIES. So many interesting stories and valuable lessons. Historical figures, those close to them (those are often the real treats!)
Also people from all walks of life, different industries. Artists, entrepreneurs, athletes, statesmen, etc. Bonus points for listening to the audiobook if subject narrates it.
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.
Take the family on periodic “spending fasts.”
As an exercise, go a day, a weekend or a week without spending any money. Make due with what you have.
Encourage participation. Tie in spending fasts with holidays, lent or in support of a cause.