If three suits have been led or shown, do not attempt to discard from
strength. You question your partner’s intelligence. If your only
four-card suit contains but one honour, do not indicate strength
unless you are particularly desirous of having that suit led to you.
When you have no suit that you are anxious to show, discard from the
suit led originally by your partner, or even, when it is obviously
established, from the adversary’s suit. This implies that you have no
strength to indicate, but you are protecting your hand.
It is bad policy to discard all the cards of one suit, as it betrays
any strength your partner may hold.
As the younger hand, infer from your partner’s discards what suit he
is guarding.
When the dealer can lead through a king in your hand, try to keep it
twice guarded.
It would be unwise to discard from an established suit if you hold a
sure re-entry card; as all you require is the lead, the best discard
is from the suit containing the re-entry card.
If you hold a tenace or strength in a suit over the dummy hand, it
may be a better discard than your longest suit.
When your partner has shown a four or five-card suit, don’t look to
him for much further strength.
Protect all four-card suits even if they are but to the nine or
ten, and remember a jack or ten twice guarded will often block the
dealer’s suit.
Watch the dealer’s discards and protect the suit that he is saving.