Players should always show consideration for other players on the course and should not disturb their play by moving, talking or making any unnecessary noise.
Players should ensure that any electronic device taken onto the course does not distract other players.
On the teeing ground, a player should not tee his ball until it is his turn to play.
Players should not stand close to or directly behind the ball, or directly behind the hole, when a player is about to play.
Etiquette courtesy of the USGA.