Depending on what type of test they give you, it may help to read “The Big Book of Big Secrets” by William Poundstone.  There is a section in it about the Rorschach Test; what the shrinks look for, what to say and what to avoid.  It may be of assistance.

Sorry I can't be more helpful, but I'm not familiar with the specific things psychologists look for in an MMPI, as far as what is a red flag and what is considered "normal."  I can't immediately think of any books that have that information either.   

You might be able to find some information at http://www.familyrightsassociation.com/psych/MMPI/.  Their views are rather outside the mainstream but there are quite a few links on that page to information on the MMPI.

I majored in psych in college and the main thing with the MMPI is the repetitive nature of the test. This is an attempt to maintain the tests internal validity. Many questions will be repeated by rewording or simple word re arangement. Have you ever lied to a loved one? Or, Have you ever told someone you loved something insincere? You must be careful to identify these and answer them consistently. The test also wants to ensure that you are not trying to present an overly grand image and it will give you statements like I read the newspaper everyday. You must of course answer the question literally. Nobody reads it EVERY day without fail. It will also give you really out there statements, maybe about aliens or voices telling you things, and you clearly don't want to say you agree to those statements. Basically, iff you are being honest, you will not really have a hard time.

The MMPI-2 consists of 567 statements to which the subject responds with true, false, or cannot say. The items cover a wide range of topics, including attitudes on religion and sexual practices, perceptions of health, political ideas, information on family, education, and occupation, and displays of symptoms known to be exhibited by certain groups of mentally disturbed people. In addition, this MMPI-2  also rates the respondent on nine important behavioral dimensions:

    * Apparent need for further mental health assessment or programming
    * Indications of socially deviant behavior or attitudes
    * Extraversion, need for social participation
    * Leadership ability, dominance
    * Likelihood of hostile or antagonistic peer relations
    * Indications of conflicts with or resentment of authorities
    * Likelihood of mature, responsible behavior
    * Likelihood of positive or favorable response to academic programming
    * Likelihood of positive or favorable response to vocational programming

Walker, thanks for your help. Let me ask you a question. What if you are a bit inconsistent in your answers? I mean, I had a question that asked if I've ever lied and I said yes. Then it asked me a question to this effect, "I could not deceive someone even if I tried." I checked true on that because I'm a horrible liar and people can tell when I lie. Is that going to show up as inconsistent and make me take a retest?

Panama, I did control my breathing until the control questions came.