One mistake will never kill you. The same mistake over and over again will.
Rough spots sharpen our performance. And more often than not, obstacles can be turned into advantages. You just can't let your disappointment get in the way.
It isn't the people you fire who make your life miserable, it's the people you don't.
Say and do what you mean, but never say and do it meanly.
You only get one chance to make a good first impression, and yours may be in the hands of the receptionist.
Direct your energy toward achieving a goal, and tackle the problems with an emphasis on edging closer to a successful result.