QUOTE (questionmark @ May 13 2008, 07:19 PM)

Having something printed in a book is mostly hundredfold more expensive than having a website...so it is less likely to contain outright bunk (sometimes outright lies though).
I disagree. Having someting printed in a book means only that someone can afford to publish it themselves, or that a publisher believes that the book will sell. Very little thought is given in this process to factual accuracy (with the general exception of textbooks and avoiding libel). For example, try 'fact checking' or 'logic checking' some von Daniken.
To the OP: Good question! My own fairly arbitrary top ten:
1) Try to read both sides of any claim. If the thing you're reading is controversial, try to understand
why it's controversial.
2) Try to develop a 'spider sense' for possible nonsense. It's hard to explain how it works, but if you start to do your reading with a 'how do they know that?' hat on, a certain intuition can be developed.
3) Also develop a sense of hierarchy in judging the reliability of sources. This would probably range from 'peer-reviewed academic article', down to 'difficult-to-read website with too many fonts, colours and moving things, and a prominent photo of the author which wouldn't look out of place on a list of people banned from TrekFest 1983'.
4) Extraordinary claims require extraordinary evidence. Soundbite, I know, but it is a fair rule of thumb to say that the claim "I once had a hamster called Graham" will require less rigorous justification than the claim that "I once had a hamster who told me his name was Graham".
5) If the stuff you're looking at is of a scientific nature - i.e., it's making verifiable claims about the nature of the world or any part of it - then see what other scientists have made of the claim. Google the claimant - 'real' scientist, or nutter in an attic? Check the references - does the article cite the British Journal of Medicine, or channeled messages from Planet X?
6) Ask what the motive of the author is. What's the view being 'sold'? What's in it for the author? Money? Fame? Book sales? Women? A smug sense of spiritual superiority?
7) Check out the type of language being used. As a general rule, there are certain 'red flag' words or phrases which indicate nonsense: 'quantum'; 'vibrations'; 'energy'; 'life force'; 'can it be a coincidence that...?', etc.
8) Think about the real-world consequences if a claim an article makes is true. For instance, what would the world really be like if the human mind could influence probability? If the government were capable of perpetrating worldwide conspiracies involving the knowing collusion of thousands of people? If there are people who are able to simply will money to come to them?
9) Find out as much about the 'establishment' view of things as you can; the 'accepted academic consensus' is not always true by definition (indeed by its nature it is always tentative), but offers the only reasonable baseline to which to compare claims and theories.
10) Always bear in mind burden of proof. If someone is making a claim, it is up to them to supply the reasons why that claim is true, rather than to demand others disprove it.
But don't trust this list - you've no reason to believe it's true!