A very dedicated, "green" colleague/friend just published a new book, titled, You Don't Have to Wear Hemp Underwear. Hence my stupid pun in this post's title.
I thought a good title for the book would be "Green without Granola", but the author, quite wisely didn't consult me! Give it a read. Great, practical ideas. Simple ways to do green. Just start somewhere! Watch the video.
Or better yet, just buy that damn thing.