Well, my very best practice is that my husband works for an environmental organization. And I subsidize his wages with my job. Sometimes I think that counts for a lot, sometimes I think it's nothing at all.
Otherwise, let's see, we drive a fuel-efficient vehicle, which we share (one car for the family); walk and/or take public transit when feasible; recycle; compost (okay, honestly, he composts; I do it when he reminds me to); we try to buy used things rather than new, though that's less than consistent. Reusable shopping bags? check. Eco-friendly light bulbs? check. Biodegradale dish soap, laundry detergent, and all that. Oh, and lunchbox rather than disposable bags for the kid. Eco-friendly lawn care, and no deet in the bug spray.
But all told, I don't think we're anywhere near as good as you, especially when it comes to hot water issues. I'm really impressed with what you do!