I think I have turned a corner of sorts. I was tired today, but getting on the bike was second nature, and getting the hills behind me to get home was just part of the ride-didn't press or push or anything, just got it done. It was a bit cooler today and not as humid, so it was a nice ride.
Turning another corner, I think that I have outgrown my pedal clips/straps. I notice that I cannot get the ball of my foot exactly where I want in order to pedal efficiently, and I am not getting power from every part of the rotation. Time for clipless shoes and pedals.
Really starting to love commuting.