I've been reading Jeff Speck's Walkable City: How Downtown Can Save America, One Step at a Time. I highly recommend it.
One reason why we moved to the Varick Incubator is not only to be at the center of the action, but also because I always loved exploring NYC on foot - the most walkable city in the US.
To this day, I'm amazed how the urban landscape changes within a few hundred feet as you walk from one NYC neighborhood to another - the upscale shops of Soho, to the amazing restaurants of Little Italy, to the hustle and bustle of Chinatown.
And according to Jeff, it's no accident that the most vibrant centers of innovation in the US are the most walkable cities. Cities are "serendipity and inspiration" engines - meetups, cultural events, random sightings, diversity central, happy accidents.
That's why I've taken to walking a lot more. Not only is it the main form of exercise I get nowadays, my best inspirations often come to me when I allow my mind to wander as I explore the urban canyons of NYC on foot.