Honestly, just be YOURSELF! That's all it comes down to. I got accepted everywhere that I interviewed at and I do not think I'm nearly as good on paper as some of the other people I met on interview day.
They liked you enough to ask you to come for an interview. If you be who you are - and they like you, you'rwe in or on a wait-list. If they don't like you for who you are, and you get rejected...did you really want to go there anyway?
That was my attitude and it worked for me - that I'd get in places where I was liked and not get in places that there just wasn't a fit or connection. And believe me, I'm not expert interviewee - I usually get the anxiety.
As for tough or "gotcha" questions...I took my time to answer them with a "wow, good question!" response. But honestly I did not get any tricky ones, except at one interview.
From a PsyD you will be asked:
Why a PsyD not a PhD?
Where do you see yourself working in the next 5 yrs? The next 10?
Why our PsyD program?
Questions about past experience clinically...
When they want you to ask:
Ask about things that matter in order for you to want to go there. This is your true chance to interview THEM:
*Internship match rates (everyone should be asking about this one)
*Practicum Placements
*What type of populations can students work with?
*Where are some of their grads working? Are any doing what you want to do?
Good Luck I'm sure you'll do very well!
Jon