As mentioned, LEARN THE RULES! It is amazing how many people think they know the rules or think they can officiate how they think the rules aught to be.
Learn how (and when) to blow the whistle. How it sounds and your timing is an indicator of your mastery of the game.
Demeanor, be calm and poised, make good decisions and don't let fan, player or coach reaction or expectations influence your judgement.
TEAM with your work crew, be supportive and use their support. Keep them in the game with you - stay in the game with them.
Never assume anything is going to happen - be ready, but let it happen before you blow the whistle.
There is no match beneath your skills. If you are working a middle school, or jv match you should give it your best just like it is a state finale. Be profession, work on your mechanics.
And remember, we are in the people business.
