Update your wardrobe. Shine your shoes. Write down five interview questions that scare you most. Then write an answer for each of them. Write down your answers to other frequently asked interview questions.
Role play interviewing with a friend.
Verbalize your strengths. Make a list of 10 questions you want to ask your future employer. Go on practice interviews with companies where you don't especially care to get hired. Write thank-you notes to anyone who has helped you. Prioritize this list of things to do.