All five pairs bid 3NT but only 2 made it.

As always count immediate winners before playing a card from Dummy. You can count 5: ♠ A K; ♥ A; ♣ A K.

If you are lucky enough to get a Spade lead that makes 6 as you get a free finesse on the first trick.

What is your best source of extra tricks? Diamonds. You must attack this suit whilst you have the others stopped.

Play the ♦ 10 (high from shortage) and if the ♦ A doesn't appear then carry on playing Diamonds until it does. 

If the Diamonds do break 5-1 you'll have to fall back on the Spade finesse but in this case they behave and you're easily home

If you get a Heart lead don't panic. Play low from Dummy to the first trick, Even if North winds and plays another Heart you'll still have ♥ J 10 as a stop and can continue as above