One of the big no-nos in cyberspace is that you do not go into a social activity, a chat group or something like that, and start advertising or selling things. This etiquette rule is an attempt to separate one's social life, which should be pure enjoyment and relaxation, from the pressures of work.

You don't want to look too chic at a Washington party or people will think you don't have a job worth losing.

Should you happen to notice that another person is extremely tall or overweight, eats too much or declines convivial drinks, has red hair or goes about in a wheelchair, ought to get married or ought not to be pregnant -- see if you can refrain from bringing these astonishing observations to that person's attention.

It is wrong to wear diamonds before luncheon, except on one’s marriage rings. Before, after, and during breakfast, luncheon and dinner, it is vulgar to wear a mixture of colored precious stones. It is always a comfort to know that so many things one can’t afford to do anyway are vulgar.

Manners require showing consideration of all human beings, not just the ones to whom one is close.

It is, indeed, a trial to maintain the virtue of humility when one can't help being right.

The invention of the teenager was a mistake. Once you identify a period of life in which people get to stay out late but don't have to pay taxes - naturally, no one wants to live any other way.