Do not weep do not wax indignant. Understand.
Expect problems and eat them for breakfast.
Well done is better than well said.
To be a good loser is to learn how to win.
Only the educated are free.
Either you run the day or the day runs you.
Be kind whenever possible. It is always possible.
You never know what motivates you.
Always desire to learn something useful.
Never complain and never explain.
That's something I learned in art school. I studied graphic design in Germany, and my professor emphasized the responsibility that designers and illustrators have towards the people they create things for.