5) Never play in a thunderstorm--head for the clubhouse.
6) Walk whenever possible--it's good exercise, carts cost too much.
7) Be courteous to the people in the pro shop; they could be your new best friends.
8) Learn to control your temper on the golf course. Just because you shanked a drive into the parking lot and heard shattering glass doesn't mean you can explode to the point that old ladies sneer and report you to the marshal.
9) Be adventuresome. Frequently when you want to play, the starter will pair you with a stranger, and this can be a learning experience. Don't act disgusted that you have to play with a stranger--he might be annoyed that he has to play with you.
10) Above all, enjoy the game, the camaraderie, and the chance to meet a new challenge in a gorgeous setting.