Hey manchiso,
I know the response is late, but we're hoping the answer helps other candidates out there.
Although the interview is an important part of the admission process, it is only a way for the schools to ensure that you are who you say you are. Remember, you are already prepared for this. The application process has trained you to understand the picture you want to paint to the interviewer.
I personally think that one of the best ways of preparing for the interview is jotting down points from different parts of your application and creating an elaborate document on it.
The application is just a summary of who you are.
Having extra content for the different aspects of your application definitely helps since you might be questioned on only specific parts due to the constraint of time. Go over this document a couple of times to get familiar with how you are going to answer questions.
Feel free to improvise since the queries are going to be about your life and you know better about your life than anyone else. Talk about values that are important to you personally. Solid preparation for any speech or interview is thorough knowledge on the subject.
Ask yourself questions like 'why would you be a good fit?', 'what makes you stand out amongst your peers?', 'what are your strengths and weaknesses?', 'how will your achievements help you in the program?' and 'what are your short term and long term goals?'
If you struggle with speaking, then I suggest reading online resources such as Dale Carnegie's books. Hope your interview went well.
For a free profile evaluation, essay tips and other MiM queries feel free to check out,
https://www.mim-essay.com/
We offer application services for top MiM programs around the world.
Hope this answer was helpful.