The first thing is too know how too dress. If it is not a job where they don’t wear shirt and ties, than don’t wear a shirt and tie. Only dress for the way they dress. Also remember when you step in for the interview, is that they need you and you don’t need them. Ok so maybe you do need them but don’t let them know that. Go in like you own the place and make sure you control the interview. It also does not hurt to do research on the company so you can tell them a lot about it. It can be nervous but if you have an interview with the opposite sex. Your chance of getting a job goes up actually. Be a little flirty but not cocky and a pervert. Also don’t be afraid of telling them what hours you want to work or what days you want off because you don’t need them, they need you a lot more. If you don’t have a car and they ask if you have reliable transportation, answer that you do, a car isn’t just reliable transportation, it can be a bike, bus or train that can be reliable to get you to and from work. Also, try to be clean cut and if you hav long hair, just make sure you are cleaned up
