You mentioned you're as aero as you can get, so I'll assume you don't have a pannier or other high-drag equipment to bail. And even if you did have a pannier, it would probably be out of necessity if you have to carry work clothes, lunch, and layers for different weather in Michigan.

So with those assumptions out of the way, an aero bar would be the biggest single step forward in efficiency. Mentally, you can look at it as your secret weapon. Hah, take THAT, wind!! I'm an aerodynamic doper and I'M NOT SORRY AT ALL!!