This tips are too generic...can be applied in any situation...
I guess one most important question is "Why Do you want to do an MBA?" which one should prepare...
And more than anything else, try to steer interview in your comfort zone, constantly dropping hints of things that you have done, or your competency areas....
And lastly, asking intelligent and genuine questions back to the interviewer shows your preparation and thoroughness....
Say something that is of benefit to the institute. Like, I want to be an entreprenuer. They think if this guy succeeds it'll bring fame to the institute.