It's divided into three sections: (1) Change a few habits; (2) Maintain your stuff; and (3) Buy a few things. Very simple and well presented, with lots of research links. Some tips you will have heard before...
[ Are you listening, M---?] ...and some may be new:
It's not self-righteous or crunchy granola in tone, either, just helpful. Also has contact info for activist geeks. Highly recommended.
UPDATE: More Bush lawbreaking - this time on energy standards. Elliot Spitzer and a few NGOs are suing the Department of Energy in attempt to bring them to heel.