Expect problems and eat them for breakfast.
What you do today can improve all your tomorrows.
Quality is not an act, it is a habit.
To be a good loser is to learn how to win.
Be gentle to all and stern with yourself.
Begin to be now what you will be hereafter.
Know or listen to those who know.
It's always too early to quit.
If you think you can do it, you can.
Be thine own palace, or the world's thy jail.
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.