Be confident, but not arrogant. Make eye contact with the person you are talking with. Don't try and be too anxious and do something stupid like bouncing your k

Be confident, but not arrogant. Make eye contact with the person you are talking with. Don't try and be too anxious and do something stupid like bouncing your knee up and down hitting the table or constantly rub your hands together (I've seen both things done during an interview and you just look rude). Research the business prior as most companies will ask you to explain to them what they do, if asked this question, it will make or break the interview. Be honest as possible, but know when to not be too honest. Don't go detailing how you systematically helped the previous company you worked for spiral into bankruptcy or how you never got along with your boss. There is a line, answer their questions, but don't go into too much detail unless asked for it (it's rare an interviewer wants copious amount of detail). On the honesty front, don't be afraid to embellish your experience and back story slightly either, but ensure that it's manageable embellishment. Because if you go claiming you have these amazing skills and they find out you don't, you'll be sent packing quickly and it'll be embarrassing for you.