Expect problems and eat them for breakfast.
To know oneself, one should assert oneself.
It's always too early to quit.
The most effective way to do it, is to do it.
I can, therefore I am.
Either you run the day or the day runs you.
Never complain and never explain.
Well done is better than well said.
Be gentle to all and stern with yourself.
To be a good loser is to learn how to win.
I'm someone who's done the opposite of whatever the received wisdom is, to keep your career going into your 50s.