Amy links to a post that sure hits the mark, "the seven warning signs of bogus science". Now I look at her link, I think I have read Robert Park’s list before, but had forgotten it, being a creature of no memory.
As well as the extracts Amy highlights, here is one that is spot-on:
"7. The discoverer must propose new laws of nature to explain an observation. A new law of nature, invoked to explain some extraordinary result, must not conflict with what is already known. If we must change existing laws of nature or propose new laws to account for an observation, it is almost certainly wrong."
It is amazing how many people submit work to scientific journals under "clause 7".