27) Always be aware of TRUMP PROMOTIONS......e.g. if partner leads a card for you to ruff that is obviously going to be over-ruffed, he is probably trying for a trump promotion, so if you have Q x of trump, trump with the Q, forcing declarer to trump high, promoting partners doubleton J. Also, trumping partner's "winner" can result in a trump promotion: Partner leads his "good" queen of clubs (declarer is going to ruff it), and you have a stiff queen of trump, and know that partner could have a doubleton Jack of trump. If you just discard, declarer will trump low, then play his AK of trump and get both your Q and partner's J of trump. Notice, if you had ruffed partner's club Q, partner's trump J would now be promoted to a sure winner. Trump promotions occur fairly frequently... be aware of them.