The subject is the most important aspect of portrait photography.
Making the subject comfortable with you is an essential factor for a successful portrait photography session. Take out time to connect with your subject before the photo shoot and if possible, meet up in person. It is best to get to know each other and let the subject know more about your style of photography and what exactly you will be looking for in the shoot. Discuss your ideas about the shoot with your subject and factor in her preferences and abilities into your plan.