If you think you can do it, you can.
Problems are not stop signs, they are guidelines.
The wise does at once what the fool does at last.
Quality is not an act, it is a habit.
Expect problems and eat them for breakfast.
To know oneself, one should assert oneself.
Always desire to learn something useful.
You never know what motivates you.
Never complain and never explain.
The most effective way to do it, is to do it.
As my dad said, you have an obligation to leave the world better than how you found it. And he also reminded us to be givers in this life, and not takers.