Cheer The fun lies in being able to play. Encourage development over winning. Support the entire team, not just your child. Cheer the good play of all the players. Practice good sportsmanship.
Players learn by example and parents set the most powerful example.
Let the players play and the coaches coach. Don't instruct your child during the game. You will only confuse the player. Let the referees referee. Yelling at the referee does not accomplish anything positive.