We recycle anything that is recycable (paper, plastic, etc. to the local bins, aluminum to the salvage yard for cash).
Also, we have replaced just about all our light bulbs with the cfl lights.
The little rainwater we get is gathered and used in the lawn.
Added indoor plants for fresher air and better overall interior environment.
We stay upstairs as much as possible since heat goes up in the winter and in the summer open the upstairs windows for the breezes plus the heat in the first floor travels up, cools and is blown out the windows for less energy use in the summer and winter.
Plus most of these changes have kept my wallet greener.