"One way to distinguish the crank from the creative maverick is to see if they are able to comprehend or express the dominant paradigm they would like to overthrow." - Chris Ho-Stuart
"People will work every bit as hard to fool themselves as they will to fool others - which makes it very difficult to tell just where the line between foolishness and fraud is located." - Robert L. Park
Good starting points are the Usenet sci.skeptic FAQ, and the big annoted bibliography of the SKEPTIC mailing list. And Bob Carroll wrote a really good dictionary.
Stage magician James "The Amazing" Randi offers an up-and-up $1,000,000 prize for the first person who can demonstrate a psychic power. Penn and Teller have described Randi as their hero.
Some really good books:
A random selection of links: