Define what you do as it relates to the job, think about three to five past experiences that are relevant to the job at hand and try to quantify in terms of time, money or people. Then list three to five strengths you have that are pertinent to this job (experiences, traits, skills, etc.). All of this adds up to the message you want the interviewer to know about you when you leave.
Eleanor is strong in communications and connecting with people. She has a strong background and proven success with customer relationships. Her real strength is her follow-through. She prides herself on her reputation for meeting deadlines.