You must be fully prepared well before the time. Arrange all the required documents in a folder and make sure you are not missing anything as it will give an impression that you are irresponsible and unprofessional.
At night before the interview, you should sit in front of the mirror and question yourself. Imagine yourself in the interview room and prepare clever answers for the expected questions. You may ask a friend or family member to conduct the demo interview and tell you about your strengths and weaknesses. Remember, “Prepare for the worst and hope for the best” is the only rule to prime yourself.
Wear proper clothes:
You must keep in mind that people evaluate you even before you speak so make your first impression pleasant and impressive. You should wear proper clothes for the interview. It does not mean that you need to wear expensive, branded clothes but you should look professional while entering in the interview room.
You should not try to give the impression that you know everything. If you do not know the answer then admit it and trust me your honesty will really impress the interviewer. Similarly, do not lie about your credentials as any blunder will hit you hard.
Take this interview as a friendly chat where someone wants to know about you and your skills. Share your thoughts freely and if the opponent differs then make your point clear in a nice manner. You should not argue but do not show too much leniency that portray you as a weak person.
Show your eagerness:
Instead of showing how much you “need” this job, you should make them realise how much you “want” to be on this post. Show your eagerness to learn more and you are ready to expand your horizon.