Always remember you're unique, just like everyone else. It may be that your sole purpose in life is simply to serve as a warning to others. It is far more impressive when others discover your good qualities without your help. If you tell the truth, you don't have to remember anything. Some days you are the bug, some days you are the windshield.
Good judgment comes from bad experience, and a lot of that comes from bad judgment.
There are two theories to arguing with women. Neither one works. Generally speaking, you aren't learning much when your mouth is moving. Never miss a good chance to shut up. Experience is something you don't get until just after you need it.