I am freaking out, and no, I don't think that is the best way to prepare. But besides that, I am thorougly researching the schools I have interviews at and practicing my answers outloud to commonly asked questions (why dentistry? and why ___ dental school?). It's wierd to say them outloud and I think a lot harder than saying it in your head. But, mostly I'm just freaking out!
By the way, GatorDDS, check your PM.