Practice, practice, practice. It's only a little different from a job interview. Write down what you want the committee's impression of you to be, then keep that in mind and relate your answers to it. (Generally, "I am a great fit for your pharmacy program because..." and "I will be a great pharmacist because..." in combination will cover most of your bases.) The coherency will help. The adults (parents, mentors) in your life have interviewed a number of times & can probably help you hone the skill you need. It's not so much about memorization as it is about knowing generally what you want to say & answering to that end on the spot. Come up with examples and stories as to what life skills you learned from your limited ECs, your role models, and school. Hope that helps some.