Found this excerpt from a book by Texas Coach Mack Brown.
This is also posted on www.westcoastoffense.com

WHAT CONSTITUTES A GOOD COACH
-He possesses thorough knowledge of fundamental techniques.

-He is a teacher. The most important characteristic of a successful coach is his ability to teach. Games are not won by what a coach thinks he knows; they are won by what his players have learned.

-He is prepared-at meetings, practices, games.

-He is inquisitive, constantly improving his knowledge and teaching methods.

-He has a positive attitude.

-He is a tireless worker willing to devote time to all phases of the program.

-He has a winning attitude and knows what it takes to win. He recognizes a winner by judging a player's performance.

-He pays attention to details. Persistence and perseverance regarding the details makes for a winning program.

-He is willing to assume responsibility for thinking out an assignment and for creatively solving problems.

-He is loyal, honest, and dedicated to the head coach, his fellow coaches and the staff, the school, and the players.

-He does not over-coach. This can take the initiative and instinct out of a player, causing him to be overly cautious.

-He is enthusiastic.

-He is demanding. A good football team is built on good habits and discipline.