Remember that it takes time to sign in and to complete any other paperwork. Make sure you know exactly where you have to be for the interview. If you are in unfamiliar territory, take a practice drive to the company the day before the interview. Sit straight, make eye contact, and avoid crossing your arms or legs. Listen carefully to what the interviewer says.
People love to hire individuals excited about their company.
Don't make the interviewer guess if you really do want the job. Don't be afraid to brag a little about your experience and talents, and how they will benefit the company. Most people get nervous during a job interview. Practice with a friend, or interview often enough to defuse the fear. No matter what happens, don't overreact to obstacles such as salary, location, or other issues.