Make sure you learn enough about the job and the company to determine if you would take the job. It shows that you're interested, helps you to answer the interviewer's questions, and gives you the information you need. Researching the company will allow you to demonstrate how your qualifications make you the most suitable candidate for the job. Know why you're right for the job and be able to quickly and accurately convey it. Don't be trapped.
Plan answers to tough questions ahead of time.
Avoid discussing salary issues before it's time to negotiate the job offer. But don't be more than a few minutes early. Be friendly to all. It's not unusual for companies to use secretaries or receptionists as part of the screening process. Convey a confident attitude, but avoid swaggering or boasting.