I'd have a hard time choosing what to wish for but I think it would be more time. Nothing amazingly obscene or anything, just the ability to add 10 minutes here and 5 minutes there. The possibilities of that talent would be amazing:
Last minute wardrobe change, no problem.
Shoelaces in a triple tight double knot, no worries.
5 minutes to get someplace 10 minutes away, that's alright.
Went to bed at 11, had to get up at 1, 2, 4 and had your alarm set for 4:45, that's okay, take an extra 30 minutes on me.
2 seconds before it's time to leave... "Actually, I want cold lunch, not lunch at school." "Okay, let me just set the clock back a tick, we can do this."
Yep, if I had one wish, it wouldn't be for mountains of money or even world peace... nope, I'd wish for the ability to control time or in other words the ability to put things off even just a few moments longer and most likely still be running late. :P