Avoid sarcasm. Don't insist on the last word.
Hear only the things you should hear - be deaf to others.
Never charge a player and, above all, no pointing your finger or yelling.
Keep your temper. A decision made in anger is never sound.
Take pride in your work at all times. Remember, respect for an umpire is created off the field as well as on.
Review your work. You will find, if you are honest, that 90% of the trouble is traceable to loafing.