ProInterviewers are professionals who are busy most of the time. Determine an appropriate date and hour, punctuality is everthing.
Do NOT forget that, your ProInterviewer has no idea about you yet. Give them information as much as you can so they can help you better. Fill every information boxes and make your ProInterviewer be ready.
After all these steps, your interview room will be ready and all you must do is to wait for your time!