Teach him how to fish, and he will sit in a boat and drink beer all day. If you drink, don't park. Accidents cause people. Some days you are the bug, some days you are the windshield. If at first you don't succeed, skydiving is not for you.
Good judgment comes from bad experience and a lot of that comes from bad judgment.
A closed mouth gathers no foot. Duct tape is like the force, it has a light side and a dark side and it holds the universe together. Eagles may soar, but weasels don't get sucked into jet engines. Never miss a good chance to shut up. Generally speaking, you aren't learning much when your mouth is moving.