By being well prepared you increase your chances of doing well in the interview.
Employers look for people who seem comfortable with themselves and the interview process.
When the phone call comes, do not be afraid to ask for specific details. Make sure you have all the information you need. Be clear on where you are to go on the day of the interview. If you will be traveling, make sure plans are clear. Additionally, be sure to get the name of a contact person and a phone number you can call in case you have additional questions.