Keep your answers brief and concise. Unless asked to give more detail, limit your answers to two to three minutes per question. Tape yourself and see how long it takes you to fully answer a question. Include concrete, quantifiable data.
Interviewees tend to talk in generalities.
Unfortunately, generalities often fail to convince interviewers that the applicant has assets. Include measurable information and provide details about specific accomplishments when discussing your strengths. Repeat your key strengths three times. It's essential that you comfortably and confidently articulate your strengths. Explain how the strengths relate to the company's or department's goals and how they might benefit the potential employer.