Bike, walk, run, ride subways
Help organizations like Envirolution and My Bag Cares
TURN YOUR AIR CONDITIONING OFF WHEN YOU ARE NOT IN YOUR APARTMENT!!*
Reuse whatever you can-think outside the box!
Drink water out of the faucet, not bottles (NYC has some of the best tap water in the world).
Take the Jitney (even though I hate)
*I had to scold Rachelle numerous times about this and showed her how hard her generator was working on her rooftop (see photo above)