I do like winning I must say. Even really simple things like making it to the lift just as the door close or getting my Pin number right every time at the cash point.
What really helps in these situations is if you make a fist and crook your arm whilst dipping your head and shouting "Yyyeeeeeeesssss! Wiiinnner!".
Reminds all those loosers around you that they in the presence of a greater being.