Sit down with your CV and make notes, about your work record, what you've achieved. Look at yourself as a person in employment - how do you see yourself, what have you done, what ambitions do you have. Make notes and prepare and rehearse sound bites about yourself. Remember that one of the most common of interview questions is 'Tell me about yourself' prepare a sound bite for this in particular, but not a life history. Usually interviewers want to know about personal qualities not achievements - though examples can be included to support your statement.