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It's been years, but I would make sure I was up to speed on some basic differential diagnostic principles relevant to differentiating major diagnostic categories, i.e., building blocks of mood disorders (manic/hypomanic/mixed) episodes, differentiating between psychotic disorders and MDD/bipolar vs. schizoaffective. Many boards will present you with details of a hypothetical case and ask you to make such a differential. I'd also be ready to have an answer to the question, 'why are you in Louisiana (lol)?' They also have (or had) a multiple choice jurisprudence exam relevant to Louisiana laws pertaining to the practice of psychology.
