Make a point of seeing that your caddie always replaces your divots, or replace them yourself if you have no caddie. This, as we all know, is a golfer's first duty. If your ball at any time came to rest in a hole where a divot had not been replaced, you would be extremely annoyed, would say hard things about the other players on the links, and would declare that the course was badly kept.
Never practise swinging on the putting green. It is not good for the green, and the greenkeeper who takes a pride in the results of his work is not usually in the best of tempers when he sees you at this little game.
When carrying your own clubs, do not throw the bag down on the greens. If you do so the toes of the iron clubs are certain to make marks, which neither improve the greens nor the game of the players who follow you.
Never try your shots over again when there are other players behind you. It makes your partner uncomfortable, and he feels that he ought to apologise on your behalf to those who are kept waiting.
When practising, use the club that gives you the most trouble, and do not waste your time in knocking a ball about with the tool that gives you the most satisfaction and with which you rarely make a bad stroke.