Congrats on getting an interview! Last year the day was structured with 4 components. There was an interview: you are interviewed with at least one person and there are two faculty members interviewing you. The essay portion. A tour of the OT spaces and then a q and a session with current students. For the interview research the school and have an unique answer of why you want to go there. You want to stand out against the other person you are interviewing with. The questions are pretty basic but make sure you have a couple of questions to ask then as well (save any specific class questions for the current students). My biggest advise for the essay is to brainstorm a draft before you write it out, there isn't much planning you can do right now for the essay. Best of luck with your interview!