Have you ever thought about biking to work? If you're like me, you really want to, but fear the road! I'd love to slip in an extra workout (goodness knows I need it after the holidays) and my gym is right next to the office. Even still, I'm concerned about sharing the road with those crazy D.C. diplomats (immunity causes strange behavior), tired cab drivers and people like... well, like me, who are always in a rush.
My brother recommended Bikely yesterday, a site for bike commuters to share "safe, green routes" with each other. I love it! I found a slightly longer but significantly safer commute to work on two wheels. The Bikely site also gives you elevation changes - extremely helpful for planning for varying energy levels along the way.