We all have dark thoughts and moods every once in a while. That’s part of being human. But any sustained ideation or inclination to hurt yourself or someone else is a red flag and needs mental health intervention.
Start “home economics” school with them. Laundry, cleaning, cooking, how to change a diaper, comfort a baby, soothe a toddler, what's involved in caring for pets, budgeting for food, keeping track of maintenance schedules for humans, pets, cars and machines. Engage with guests, be a good host, etc. Know when and how to tell someone to GTFO of the house (racist or misogynistic speech, etc.) Every kid needs to learn the art and science of home management. Look for and point out examples in books and movies of good home science skills.
Life is for the living. It’s okay to move on. It’s okay to laugh and dream, work, to party, to rest rest, etc. you honor the dead by living your life. Everyone meets up in the end anyway!
It’s possible (even common) to feel conflicting emotions simultaneously.
You can be glad you’re not with a girl and still be jealous if she finds a new love.
You can be glad you’ve moved on and still miss what once was.
You can be sad that something happened and grateful for something that came of it.
Humans are complex. Two or more conflicting thoughts can exist in our heads at once. It’s not a betrayal or a character flaw.
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.
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.)
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.
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.
Staying calm while under pressure or when you could scream in frustration - that is most of the battle. Sometimes the fact that you stayed calm qualifies as a win.