The disadvantage of the lead is at times most apparent, and you can
often gain by forcing your adversary to lead a suit which you cannot
well afford to open.
When there are tricks that the adversaries must win, try to make this
necessity a benefit to your hand.
Occasions for throwing the lead arise most frequently in the end
play; there are the nice situations where you gain the advantage of
position by leading a losing trump or suit card.
However, situations where it is advisable to throw the lead are so
frequent and varied in occurrence throughout the _entire_ play that
the subject can only be treated in a general way. Perhaps covered by
one suggestion; when you cannot lead a suit advantageously, try to
force the adversary to lead it to you.