In a suit contract, declarer must always decide if his first move is to draw trump, or something else. The "something else" usually involves something like:
1) Needing trumps to ruff losers in the short hand
2) Needing to first set up (or take) a discard of a loser
3) Entry issues (needing trump to get back and forth)
Playing in 6, you receive the K lead. After winning the A at trick 1, which suit do you play at trick 2 and why?
You are in 3 and the opening lead is the K. After you win your A, what do you play to trick two?
You have overbid to reach 4 and receive the J lead. After you win the diamond, which suit do you play next?
Against 7, you receive the Q lead. After winning the A, what do you play at trick 2?
You are playing in 6, West leads the 9 and everyone follows suit. What do you play to trick 2?
You are in 5 and receive the lead of the K. You win the ace. What suit should you play at trick two?
You are playing in 4. West leads the Q which wins and then continues with the 10. You ruff, then play the A and everyone follows. You now play the K. On the second heart East shows out. What suit should you play next?