It is of little use to establish a suit unless it is possible to get
the lead in the hand that contains it; therefore, the reservation
of a re-entry card in the hand that has the long suit is of great
importance. A preferable re-entry is, of course, the last trump or
trumps.
Arranging the trump lead so that the last round will be taken in the
desired hand is often a necessary precaution.
After the adversaries’ trumps are exhausted, you may be compelled to
place the lead in the opposite hand by an extra round of trumps, and
often it is necessary to trump with a high card, saving the low trump
to lead to the opposite hand.
It not infrequently happens that in order to get the lead in the
opposite hand, you are forced to trump your own commanding card.