The last few words a candidate says to an interviewer should be designed to close the deal, Bonnie Mackenzie, owner of Shore Staffing, writes in this commentary. Job seekers should express interest in the job, promise to follow up, then send a handwritten thank-you note and call them, she advises. "Eighty percent of all closed deals are completed on the fifth follow-up. Why? They can only say not sure, or haven't made a decision so many times without looking unprofessional. Your fortitude and interest will definitely come across," Mackenzie writes.