Well I can definately tell you what not to do. I am not that great at interviews because I don't have the ability to BS at all. I am always completely blunt and honest no matter what people ask me. Here's a sample of my final interview with the Sheriff for the job I currently work at. (prior to my current job I worked as a courtroom clerk in Guilford County)
Sheriff: I see here you live in Randolph County. Why did you decide to apply with my office instead of applying with Randolph?
Me: Well, I've always worked in Guilford County. I was born and raised here. I know the people here. The attorneys, the DA's, the Judges, a lot of the law enforcement officers. It's home. And well, I guess because... Randolph wasn't hiring and you were.
Sheriff: Ok... I also see here that you worked in the Clerk's office for eight years. What have you heard about me around the courthouse?
Me: Well... um... not much really. I've never heard anything bad.
Sheriff: (laughing) I guess that's a good thing.
Then he ended it by saying, "According to one of your references, they said you don't have very much patience with people who don't do their jobs, but aside from that... blah, blah, blah...
I'm like, what in the world? Thank God he didn't want me to expound on that. But he was right. I don't have a lot of patience. If it wasn't for the fact that my references were all Judges, DA's, and clerks and my experience level, I don't think I would have gotten the job based on that interview.