Feel free to add, modify or delete to suit your purposes. Please don't shout advice to your player during the game. A steady stream of technique suggestions, though, has no value. Your insightful tips may conflict with the coach's instruction. Even if you think the coach is a dolt, contrary information can only hurt the team.
Most kids soon learn to tune out their parents.
Even when dad is screaming from behind the backstop at a little league game, junior probably doesn't hear him because he is concentrating on the pitcher. If dad is being heard, its likely a distraction. Give him a chance to play. You can talk about the game at home if your child wants to discuss it. A player needs to take ownership of her game and be responsible for the outcome of her actions.