There are many things to keep in mind while you participate in the actual interview.  Know what they are so you are not caught of guard.  Always put your best foot forward to make a fabulous first impression.  To do that you need to be aware of how you are interacting and what it's saying to your potential employer during the actual interview.  Your nonverbal/verbal interactions will make all the difference. Know how to demonstrate confidence, how to participate in conversation, and how to ask/answer questions.  How you interact can make all the difference in being offered the position of your dreams.  You don't need to just physically prepare, you also need to be mentally prepared and knowing how you should interact will help you do that.