Many companies will start the interview process with at phone interview. This is an excellent opportunity to discuss the opportunity with a candidate to help determine if they are a good fit for the position and to evaluate your interest level in the position.
Treat the phone screen just as you would a face-to-face interview. Put together a list of your strengths and weaknesses as well as your answers to typical interview questions. Also have a short list of questions to ask of the interviewer.
Make sure to look over the job description and research the company. It is important to list your qualifications that match the job description so you are ready to answer questions as to why you would be the best fit for the job.