If you've ever tried to back up a trailer, you know how insanely difficult it can be. Popular Mechanics has a quick how-to that should make this process less crazymaking:
If you're doing this without a spotter, put your left hand at six o'clock on the steering wheel, and drape your right hand over the seatback. As you back up, move your steering hand in the direction you want the trailer to go.
Hopefully this will save a few curbs from being run over.