By criticizing, we do not make lasting changes and often incur resentment.
Be honest, Look for areas where you can admit error and say so. Apologize for your mistakes. It will help disarm your opponents and reduce defensiveness.
It isn't work that makes you tired, it's your mental attitude.
He who treads softly goes far.
No matter what happens, always be yourself.
The trouble with most of us is that we keep our eyes closed to opportunities that thrust themselves at us; and rare is the man who searches for his opportunity or sees one even when he stumbles over it.