The ability to teleport oneself and anything one is touching could do wonders for the world and it would be a great power to have. You could go on a family vacation and not have to pay for a hotel or work halfway across the world from where you live. You could bring food/clothing into areas that can't be reached by land or air. You could rescue survivors from disaster areas, you would be a one-man air ambulance. You could be a one-man shipping company, saving millions of litres of fuel from being burned, the possibilities are endless.
Mine would have to be seeing into the future. Then I could choose out those lucky lotto numbers and win some money. Or even if I am stuck in a decision, I could go into the future to see what would be a better outcome. But I would not want to be able to see to far, because the rest is up to destiny.
Luck. It would be great if you are always lucky, just like the girl in a movie called "Just my luck". No need to worry about embarrassing incidents like someone spilling wine over your dress during parties, or getting caught while gossiping by your boss.