I'm not as good as I could be, but I try. I still use plastic bags from the supermarket but reuse them at home for small trash cans. I drink coffee out of resuable mugs and water out of glasses; no more paper or plastic cups. I bought a Sigg bottle and love it. Love it. I don't own a car, eat vegetarian more than I would like to and haven't left the water running while I brushing my teeth since I was 6.
I applaud anyone who goes the extra mile to use reusable diapers (sorry, not for me), hang your clothes to dry (not in Manhattan) and buy local food ("A Toxic Tree Grows in Brooklyn").
P.S. Mary, this seems right up your alley.