I am reading The Real George Washington, and I found this passage very interesting. The young Washington studied a French publication called Rules of Civility and Decent Behavior. If we all studied and practiced this today, I think the world would be a nicer place to live.

In the presence of others, sing not to yourself with a humming noise, nor drum with your fingers or feet.

Kill no vermin, as fleas, lice, ticks, etc., in the sight of others.

Spit not into the fire, ... nor set your feet upon the fire, especially if there be meat before it.

Cleanse not your teeth with the tablecloth, napkin, fork, or knife.

These specifics are interesting and instructive, but I was really fascinated with the guidance more oriented to public behavior and interaction with others:

Let your countenance be pleasant, but in serious matters somewhat grave.

Show not yourself glad at the misfortune of another, though he were your enemy.

In writing or speaking, give to every person his due title according to his degree and the custom of the place.

When a man does all he can, though it succeeds not well, blame not him that did it.

Strive not with your superiors in argument, but always submit your judgment to others with modesty.

Associate yourself with men of good quality if you esteem your own reputation; for 'tis better to be alone than in bad company.

Let your conversation be without malice or envy ... And in all causes of passion admit reason to govern.

Undertake not what you cannot perform, but be careful to keep your promise.

When you speak of God and His attributes, let it be seriously and with reverence. Honor and obey your natural parents although they be poor.

Let your recreations be manful, not sinful.

Labor to keep alive in your breast that little spark of celestial fire called conscience.