The best way of approaching the play of most suit contracts is to start by counting losers. Applying this rule to the present case, you note that South has a loser in each suit. Since losing four tricks at four spades means down one, you naturally look for a way to avoid losing one of those tricks. The most obvious way of attempting to pick up a trick immediately is to put up dummy’s jack of diamonds on the opening lead, hoping West has led away from the queen. Unfortunately, East produces the queen, which you win with the ace. The next step is to try to develop an extra heart trick where only one presently exists. If you succeed, you might eventually be able to get rid of one of your minor-suit losers on dummy’s ace of hearts. However, the extra heart trick can be gained only by leading a heart from dummy toward your queen, and this requires first getting there to make the play. Accordingly, you lead the five of spades to the nine at trick two. East takes the ace and returns a diamond. You win with the king and lead the six of spades to the 10, noting with satisfaction that both opponents follow suit. Now comes the low heart from dummy. East takes the king, cashes a diamond and switches to a club. You win with the ace, cash the queen of hearts, lead your carefully preserved deuce of trumps to the three and then discard your club loser on the ace of hearts to bring in the contract. The entire procedure requires careful planning and a moderate amount of luck. Making four spades is far from certain at the start, since the outcome depends on how the adverse cards are divided, but by playing in the recommended fashion, you at least give yourself some chance for the contract.