Another one... when and how to empty the vacuum.
I trained my kids early. How to change a tire, even though they’re girls, is important. You need to be able to check the air, oil, coolant and even how to replace your windshield wipers. Amazing how many don’t know how to do that.
Another thing I had to instill in them was doing thank you letters for gifts. Of course they would still rather do other things but we made them do it every time.