Everyone always has the same kind of generic interview advice :
Stay confident, maintain eye contact (but don't stare), big yourself up but don't be a jackass, a good amount of animation/gesturing is good - ie. don't appear to be a robot. Make them laugh and you're onto a winner - you can't really prepare for that, though, it's all about timing and context. Basically, make sure you know the role.
Almost every interview is the same, however I did have one once that caught me out, big time, and made me feel extremely uncomfortable. The interviewers moved into very personal territory, asking about my home life. They then moved into "Look over there....in the corner...there's you. Look at him, and tell me...what does he NEED? I mean, I don't want generic stuff like success or money. What does he really NEED?"
Should have just walked out right then.