Non-Dealer's Play of a 'No-Trump' Hand
With a declared trump you aim to make your high cards; but at no-trump the high cards take care of themselves and you must try to establish your small cards. If you are the leader at "no-trump," open your longest suit. Save the high cards of your other suits for re-entry and try to establish the small cards of your long suit. Don't lead your aces and kings to take a look at dummy; later in the hand you will need them to get the lead and bring in your established suit. The majority of "no-trump" makes are strong in three suits. Your long suits may be the weak spot in the dealer's hand. Try to infer, from the dummy hand and your own, the high cards the dealer must hold to have declared "no-trump." You will be surprised to find how many times an inference thus drawn will enable you to play your hand to advantage. Having started your long suit, usually the best play is to continue that suit until it becomes established, especially if you hold one or two re-entry cards. Don't change suits unless your suit is hopelessly against you. When it requires two leads to clear your suit, and you hold no cards of re-entry, abandon it and play for your partner's suit—the suit that he has shown by his discard, or the suit which must be his, judging from your own and the dummy hand. In leading to your partner's declared suit, always lead your highest card; this will enable him to tell what high cards are held against his suit and it will prevent your blocking his hand.
Non-Dealer's Play of a "No-Trump" Hand