Teleportation. I could see everyone I want to, not be as late to everything like usual, and not pay a ton of money in gas. Also, I'm a courier. I'm just thinking of the amount of money I could make by teleporting all the packages and not telling the clients how it's getting there. ;) I guess you would be able to know where you were going to appear before you get there so that you don't aparate (I'm currently reading Harry Potter 6) into a wall or a person. ;) Plus, I wouldn't want to be seen as then everyone would want me to do stupid stuff.

I wonder how big of a thing I'd be able to teleport with. I helped Adina move and they bed wouldn't fit through the stairs. I might have been able to just pop that up there. Wow, that would help hugely with moving! ;)