Go in there head up, beaming with confidence (not arrogance). Think before you speak. Talk slower and directly, Look the interviewer directly in the eye (most important). Dont bullshit, if you dont know something say, "I'm not familiar with that", or someting to that effect, and man let me tell you something. Eye contact is BIG, if it a woman doing the interview, dont look at the tits or anything else but the face. Some companies will give a woman or a minority as the interview just to see how you react. If there is more than one interviewer, and one askes the question, look at each one in the eye as you answer (spells respect and confidence) dont take anything. Just go in there and get that job that is yours. Oh and one more thing, dress for success nobody cares about you body when you interview (dress conservativly) unless you interviewing as a stripper
. Let me know how it goes..Good luck