Research the company before the interview so you can answer questions about the company's products, competitors, etc. Arrive at least 15 minutes early to settle in and relax. Dress formally and be neatly groomed, with clean hair and breath. Maintain confident and composed body language during the interview by sitting up straight, making eye contact, and not fidgeting. Listen carefully to questions and only answer what is asked; admit if you don't know an answer rather than guessing. Conclude positively by thanking the interviewer.