There are several very important things you can do that will almost certainly improve your performance. Be sure you research the company as much as possible before the interview and try to incorporate some of what you’ve learned at the interview. Anticipate the sorts of questions you might be asked and practice your answers out aloud. Practising answers aloud helps you sound more articulate at the interview. Run mock interviews. Ask a trusted friend to ask you relevant interview questions (you may have to prepare the questions yourself). And don’t be afraid to seek their feedback about how good your answers are. Attend as many interviews as possible. The more real interviews you go to the better you become!