Be gentle to all and stern with yourself.
Know or listen to those who know.
Problems are not stop signs, they are guidelines.
Well done is better than well said.
Expect problems and eat them for breakfast.
To be a good loser is to learn how to win.
Without hard work, nothing grows but weeds.
Be thine own palace, or the world's thy jail.
Do not weep do not wax indignant. Understand.
Never complain and never explain.
I'm someone who's done the opposite of whatever the received wisdom is, to keep your career going into your 50s.