Practice what your responses will be, with either your friend or by recording your responses and playing them.
When being interviewed, maintain eye contact with the one interviewing.
Listen to the questions and wait until the interviewer is through before answering.
Try to be as relevant as possible when answering questions. This means that you try to relate what you know with what the company is looking for.
Try to be as cooperative and enthusiastic as possible as this will make the interviewer feel you are an easy person to talk to.
Avoid asking questions about salary and job benefits.
Send a short thank you note after the job interview .