What type of job are you going for? Would help to know to give some more specific advice.
General Advice:
-Know your CV and be prepared to explain why you don't have any previous experience/ have gaps in it etc. If you can't remember what you've put in your application they'll think your an idiot.
-Do your research about the company, make sure you know what they do, what their values are etc.
-Dress smart, even if its a casual role. If possible wear a suit, if not very smart trousers/skirt and suitable top. It's always best to be too smart for an interview rather than too casual, this way you at least look serious about the job.
Good luck!