Remember that any undue hesitancy in regard to doubling will deprive a fair-minded partner of the privilege of so doing. Such delays are too frequent at spade declarations.
Emphasise no play of your own and show no pleasure or displeasure at any other play.
Do not ask to have the cards placed unless it is solely for your own information.
It is an offence either to revoke purposely or to make a second revoke in order to conceal the first.
The dealer's partner should not call attention to the score nor to any card or cards that he or the other players hold, and neither should he leave his seat for the purpose of watching his partner's play.
When there is an unusual distribution of the cards, no remarks of any kind should be allowed.
After a hand has been played, it may be discussed to the common benefit; but the bore who is continually blowing up his partner to show his superior knowledge, together with the player who interrupts the game to discuss the play, should be ostracised from the card-room. Superiority of skill is shown by the play of the cards, not by mannerisms.
It is often difficult to refrain from showing pleasure at the accomplishment of a desired purpose, but undue elation is most aggravating to the adversaries.
Do not make a dig at the adversaries by confiding to your partner that your success was due to an ill-judged play of the opponent.
It is not good form to complain of poor cards, as you imply that the adversaries profit by your weak hands and not by their skill.