As I mentioned before in describing the proper procedure in tending the flagstick, players should always be mindful of where they're casting a shadow. When other players are putting, always stand quietly still, and be sure your shadow is not in someone's line. Same thing with any other shot on the golf course. Make sure your shadow is not a distraction to other players. Pace of play .
Slow play is golf's biggest problem.
We discussed earlier about knowing when it's your turn. Nothing will irritate your playing partners more than if you take an eternity to pull the trigger. Make up your mind, and make the shot. The longer you stand over the ball, fidgeting, taking practice swing after practice swing, the less likely you are of making a good shot. Get on with it.