The Spirit of the Game
"Unlike many sports, golf is played, for the most part, without the supervision of a referee or umpire. The game relies on the integrity of the individual to show consideration for other players and to abide by the Rules. All players should conduct themselves in a disciplined manner, demonstrating courtesy and sportsmanship at all times, irrespective of how competitive they may be."
USGA Handbook: Golf Etiquette 101
BE READY TO PLAY
Players should be ready to play as soon as it is their turn to play. When playing on or near the putting green, they should leave their bags or carts in such a position as will enable quick movement off the green and towards the next tee. When the play of a hole has been completed, player's should immediately leave the putting green.
GOLF ETIQUETTE CORNER