Study Up On Your Employer And Interviewer. One of the most irritating things as an employer is having someone come into my office who does not know my background or what is offered in my office. Do your homework before any interview. This is important for two reasons. First, you want to know if the business is a good fit for you. Second, you want to know as much about the person and place where you are interviewing as they know about you. The internet is a great source of information. Visit the company’s web site. If you know the name of the person who is interviewing you, search for them. Determine if they have written any books, articles, or book chapters which can give an insight into their interests. Everyone likes to talk about themselves. If you can get lucky and get an insight into the personal life of your interviewer, talking about their interests can be a great way to leave a positive impression. At a minimum, at least know the basics about the company you are asking for a job from.