You're a jerk. It's not OK. Learn to be better with people, and less ego-driven and self-centered.
Give yourself more to the kids, and don't try as much to protect your own mental space.
No, that guy you're trying to help can't stay overnight at the house.
Meeting my wife was so dependent on luck that any change, anywhere would make it not happen.
Forgive faster. Be kind. Don't speak or write hurtful words. Trust people, but don't confuse trust for hope or laziness.
Do the work first and the money will come. It's not the other way around; income is a recognition of the work. Even your first salary is a reflection on grades/college/interview results. When freelancing, it's a reflection of how convincing the proposal is.
Don't stick your dick in crazy. Don't cheat and don't lie. Don't stay in relationships with manipulative people (whether sexual or not).
Buy those bitcoins.
Adult: Travel more before you get into a committed relationship (and eventually marry and have kids). The money will be fine. Be much kinder to your wife. She puts a lot of weight in it.
In relation to that same advice, make your environment as positive as you can as you're also a byproduct of it. The school you go to, the things you watch, the books you read, the friends you make, the family you have, the job you take, the colleagues you connect with, the city you live in, the conferences you attend, etc will have an effect on the person you become.
Obviously use some discretion as to not destroy your life or others.
Failure is sometimes the best outcome. Not because everything burns but because you can learn from mistakes. The sooner and harder you fail, the better.
Most people will follow anyone who shows confidence.