Be present and be prepared for interviews
Although interviews are generally optional, don't miss out.  Present yourself in the best possible light and be aware of your surroundings. 

 

These interviews give both sides a chance to judge who stands before them.  If at all possible, go to the interview on the campus, not at a remote location where some alumnus volunteer will interview you.  MBA programs change dynamically and it is not entirely sure that these volunteers are kept up-to-date.