Make sure dress presentable when your preparing to go to a Job Interview.
Make sure that when you arrive at a Job Interview your not their time you were supposed to be. That means your late and that's, not a good first impression. Make sure you are there at least 10 minutes prior to your approximate time.
During the interview make that you observe the room try to make connections so that will give you more points.
Make sure you give a firm handshake.
When the Interviewer asks, tell them about yourself. Tell them good qualities and skills you have and why you think your eligible for this job.
When the interview is over make sure you thank them for your time.