When there is a question on which side to take the finesse, be careful to shut out the hand with the established suit.
Do not finesse with nine cards of a suit in the two hands, including both the Ace and King. As there are but four more cards of the suit, the Queen will probably fall on one of the two leads.
Holding ten cards of one suit, including the Ace, Queen, Jack combination, lead the Queen toward the Ace; but if the Queen is not covered by the King, play the Ace on it.
"BRIDGE DON'TS"
Don't form the habit of playing slowly.
Don't expect your partner to play well when you criticise him. A little encouragement will win you rubbers and will add to your popularity.
Don't forget that it requires more skill to play a poor hand than it does to play a good one.
Don't miss an opportunity to win the game or to save it.
Don't complain if you hold poor cards and don't exult over good ones.
Don't criticise at all; but, if you must, wait until the hand is finished.