Do lower your voice sometimes; everyone is not deaf.
Do be neat in personal appearance; collars, handkerchiefs and cuffs, should be spotlessly clean, and hands and finger nails receive careful attention.
Do not fail to use three brushes every day—the tooth-brush, the clothes-brush and the blacking-brush.
Do break yourself of disagreeable personal habits. Do not yawn in people's faces, lounge in your chair, scratch head or person, or clean finger-nails when others are present.
Do not forget to use your handkerchief, and that quietly as possible.
Do decide that temperate habits are more manly than intemperate ones, and don't think that it is one of your "rights" to smoke cigarettes.
Do learn to say "No," to lead sometimes instead of always following.
Do be careful of your manners. Remember that as the twig is bent, so the tree is inclined, and that the polished boy will be the polished man. Polish, it is to be understood, is not inconsistent with strength, but rather adds to it. The strongest machinery is of the finest polish, and the Damascus blade is of the surest mettle.
Do be sure to give up your seat in omnibus or car to a lady. Even if she be not sufficiently grateful, you have shown your good breeding.
Do remember to remove your hat when you enter a house, private office, hotel elevator (if ladies are present), when you bow to a lady or when you offer to assist a lady.