I have a 35 mile commute, but i found a few other car commuters from my office who lives a few miles away. I cycle between them, riding to their houses, pitching in gas money.

I just ride to the house in the morning, lock up my bike, and ride back home after we return from the commute. Not only does this keep me from having to have a car (dirty nasty filthy expensive things), but I also get my morning fresh air and car-dodging city-riding dosage.

cheers
-Nick