As dealer, whether you are playing a trump or a “no-trump”
declaration, take a mental stock of the cards you hold early in the
hand, and decide from which hand each combination should be led.
Although at times it may be impossible to arrange the lead, it may be
stated here that the advantages that accrue from the correct play of
most combinations of cards, are obtained by invariably leading a suit
from the weak to the strong hand; in most cases the high card from
the weak.
The four most important combinations and those that are held most
frequently are:
A Q J
A K J
A J 10
K J 10