George Washington, the Father of our Country, at a young age copied a set of rules of behavior that had been originally composed by Jesuit Priests at the end of the 17th Century. He titled his efforts as 110 Rules of Civility & Decent Behavior in Company and Conversations. You can find all 110 rules can be found online here
A selection of his rules, as written by Washington with no attempt to change them, that may be worthy of consideration are as follows:
35 Let your Discourse with Men of Business be Short and Comprehensive.
44 When a man does all he can though it Succeeds not well blame not him that did it.
48 Wherein you reprove Another be unblameable yourself; for example is more prevalent than Precepts.
49 Use no Reproachful Language against any one neither Curse nor Revile.
56 Associate yourself with Men of good Quality if you Esteem your own Reputation; for 'is better to be alone than in bad Company.
68 Go not thither, where you know not, whether you Shall be Welcome or not. Give not Advice without being Asked & when desired do it briefly.
73 Think before you Speak pronounce not imperfectly nor bring out your Words too hastily but orderly & distinctly.
82 Undertake not what you cannot Perform but be Careful to keep your Promise.
89 Speak not Evil of the absent for it is unjust.
108 When you speak of God or his attributes, let it be seriously & with reverence. Honor & obey your natural parents although they be poor.
110 Labor to keep alive in your breast that little spark of celestial fire called conscience.