Very nice bike! I'm a fairly new commuter (started back in September). Here are a few things I learned right at the start:
* If there isn't room for a car to pass you without completely changing lanes, you should "take the lane." Otherwise, drivers can get impatient and try to squeeze around you, which is both dangerous and scary.
* Related to the first point: sometimes you can't ride very close to the right side of the road. That seems to be where most of the broken glass and major potholes are.
* Carry tissues in your pocket or somewhere easily accessible. Trust me.
* Slow down. Pushing hard doesn't get you there that much faster, especially over a short commute like yours, but it does ensure you get there covered in sweat.
* If the light ahead is red, slow down. It might go green before you get there, saving you the considerable effort of getting up to speed from a dead stop.
* When the light goes green, if you are at a dead stop, don't plan on the car in front of you starting to move right away. You'll need to wait for the driver to finish his/her text.
* The world can be an exceptionally beautiful place if you are going slowly enough to notice it.

There's lots more, but those were just a few things that surprised me the first few times I rode.