They’re very teachable at this age. When behavior is bad, send to their room for a brief “time-out.”
Then go get them by sitting and putting him/her on your lap. Talk (1-3 sentences) about why we don’t behave that way and how I expect you to behave instead. Then hugs and kisses.
If the offense is really bad, introduce consequences (which have to be immediate, they wont understand missing out on something hours from now, won’t make the connection.)
Adult whining is worse than kid whining! We all have unpleasant comments to say in every day life, but do your best to keep snarky comments to yourself. Be mindful of what you're putting out there.
Keep your pants on until you (and your partner) are at least 18. Keep your pants on if you or your partner are drunk. Keep your pants on if you or your partner are not 100% enthusiastic about going farther.
Long before I was old enough to decide what I wanted my life to be about, I was set on a path of other’s choosing: marriage, kids, Catholic. I took that assignment to heart. Focused like a laser beam. Ironically, I believe that it’s because marriage and a conventional family was my prime directive that I ended up becoming roadkill on that path. My point is twofold: don’t let me or anyone else tell you what your life should look like. Maybe college isn’t for you, maybe marriage isn’t something that appeals to you, maybe it is! Keep exploring until you find a direction that fits your own values and priorities. As long as you’re paying your bills and you’re not hurting anyone including yourself, knock yourself out! Go wild! Do whatever feels right. And if you don’t know where you want to be, go where you’re needed to start with. I love you forever no matter what you do.
Practice not putting stuff off. If it takes 10 seconds or less do it now. Then move up to 30 seconds or less. Keep going up to ~3 minutes. Good example is putting away laundry or emptying dishwasher, etc.
Practice sitting and standing "like a statue" to teach them how to be still. Start with a goal of 5 or 10 seconds, gradually move to 2 minutes. Same thing for "silent game" to teach them how to stay quiet when they need to. Bribery helps teaching this concept!
Read (or listen to) The Greatest Generation by Tom Brokaw together as a family. It's broken up into small vignettes so it's easy to get through bit by bit.
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.
Lookout for the girls when you’re in a group. Some boys will try to take advantage or straight up r@pe them. Your responsibility goes beyond avoiding harming anyone. Your male privilege is a perk…earn it. Protect girls from sketchy dudes. No big deal, just help when you can and then move along. Don’t expect a cookie.
Your very existence is a miracle. Countless cosmic events and generations of ancestors had to come together in precisely the right way at precisely the right time for you to be here now. It’s an honor to be who you are. Act accordingly.