Sleeping Naked is Green is a hilarious book. What I like best about it is that it understands that sometimes this eco stuff (while really important) is a pain in the butt. And sometimes eco people (while brave and wonderful) can be really self-important too. I think the point of the book is do your best, but don't take yourself so seriously that you make people want to avoid your calls. My favorite part of the book is when our heroine returns after a business trip and finds out what happened while mom and sis house-sat (all the while trying to keep the green rules). Highly recommended by yours truly!
And here is the blog the book is about. She no longer updates on a regular basis, but if you have never read it before, it is all new to you.