The better players rarely criticise unless asked to do so; it is usually the inexperienced player who offers an astonishing amount of gratuitous and unsought-for advice.
Do not tell your partner, after seeing all the cards, what he should have done, but think what you would have done in your partner's place. Do not criticise at all, but if you must, criticise fairly.
Book.—The first six tricks won by the same partners.
By-cards.—The number of tricks won, more than six, or over the "book," is the number "by-cards." For instance, eight tricks are equal to two by-cards.
Card of Re-entry.—A winning card which will bring into play another suit. Sometimes the re-entry is in the suit itself, but when a suit with a re-entry is spoken of it means that the re-entry is in another suit.
Command.—The best card or cards of a suit. The ability to stop the suit at any time.
Covering.—Putting a higher card on the trick when not the last player.
Discarding.—When unable to follow suit, throwing away some card of another suit which is not trumps.
Doubling.—Increasing the value of the trick points.