Good, bad and ugly self-help: How can you tell?

Many self-help programs are useful, but some can direct people in ways that aren't right for them, a psychologist says.

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Psychologists: Look for authors, teachers backed by research and formal trainingSome programs don't screen for conditions that might make someone ill-suited, expert says"The Secret" user: Changes in my life are all the proof I need that it works

(CNN) -- Amber Lemna says studying "The Secret" is changing her life for the better.

The 2006 book and film discusses the law of attraction, something adherents say allows people to attract what they want by envisioning it and believing it will come. Lemna says she's used it to kick-sta