In this article, How to Really Green Your Home, Deep Down
http://www.worldchanging.com/archives/011094.html you can watch Catherine Mohr's entertaining and smart TED talk of how she grappled with her ecological impact when she was building a new home. Its provides great insights into embodied energy and water, and shows how to take them into account.
For many of us, our homes represent the largest systems that we have control over, and they are therefore the most significant places where we can make an impact on sustainability. It is important to fully understand our homes in terms of processes, networks and relationships. Bits and pieces of green technologies and some 'simple' actions won't make the difference that is possible with a whole-systems understanding and approach.