If you take the first trick in suit, and your partner throws away, do not lead the suit he has shown, even if you have the ace of it.
If your partner turn down black, make it red if you can, especially if he has turned down the bower.
When playing second to a small card, do not ruff with right alone if it is the first trick. Ruff with left alone, especially with your partner's make or adoption.
If your partner refuses to adopt the turn-up, and the third hand declares to play alone, lead a card of the same suit as the turn-down.
With one small trump, ruff as soon as you can.
Do not finesse in lay cards.
[1] “Another” means “a small one.”
THIRD HAND.
It requires a stronger hand to order or make the trump in this position than in the eldest hand, since you cannot depend upon your partner's lead, and he has displayed weakness by passing.
However, if you have a good hand at the turn-up, and are very strong at next, it is better to order, since the stronger you are at next, the greater the improbability that your partner will be able to make it next.