In the second round of a suit, win the trick when you can, and
lead out for your partner's high cards as soon as possible.
Touch only the card you intend to play.
Retain a high trump as long as you can, to bring back your strong
suit.
With a weak hand, always try to secure the seventh or odd trick
to save the game.
Attend to the score, and play as if the whole fortune of the
game depended on yourself.
Remember the number of trumps out at every stage of the game.
Note, also, the fall of every court-card in the other suits, so that
you are never in doubt as to the card that will win the trick.
Hold the turn-up as long as you can, as by that means you keep
your adversaries from knowing your strength in trumps.
Do not force your partner unnecessarily, as by that means you
sometimes become his adversary instead of his friend.
When in doubt, play a trump. Play the game in its integrity, and
recollect that Whist is full of inferences as well as facts.