Good advice in this thread. I want to add though, if you're not involved in the pharmacy profession, try to keep in touch with pharmacy-related news, and develop a concrete opinion about the problems/issues discussed. When I was being interviewed, they asked me to talk about something related to current pharmacy news, and I couldn't really respond intelligently because I didn't know a whole lot about what was happening. All I could say was, "Well, I do know that there is currently a shortage of very critical drugs, and that Obama is working to solve the problems with his health care plan...though I am unsure about the details, I feel the issue is largely economic in nature." (No sh** Sherlock, it's almost always economic!). Then they responded, "Yeah, there's been a drug shortage for...how long now? A year?"
-10 points to DH1987.
I still got in though, even though I was waitlisted. Just make sure you learn as much as you can about the pharmacy profession and related news.