You are capable of more than you know. Choose a goal that seems right for you and strive to be the best however hard the path. Aim high. Behave honorably. Prepare to be alone at times and to endure failure. Persist! The world needs all you can give.

It seems that when you get to a certain age you almost give yourself permission to misbehave and say what you think. People allow it with very old people.

I've got volumes on how not to behave. I've got more information now than a guy should have at my age.