Lileks has the goods on it. Normally I’d say read the whole thing, and I don’t want to say that it’s not worth doing so, because Senor Lileks could write about his dog’s bowel movements (or equally, or even more entertainingly, the lack thereof) and be worth reading, but apropo the title of this post, be sure at least to read the first half or so.

The second half is optional, at least from that standpoint.