I was becoming a bit frustrated with only really using my camera in the evening and on weekends, so I decided to bring it along with me one day. I work in downtown DC. I take the train and then I walk a bit. PERFECT time to have a camera in hand and try to make a good image, especially since the day to day commute can be so mundane. You get so used to it that it's hard to imagine finding anything in it that is interesting. I think it's a great exercise, particularly for photographers that don't already specialize in street photography and that is (without oversimplifying) what you DO. I think it really strengthens the eye to look for and make a really great image in unexceptional circumstances. I think I'll bring my camera along with me more...