Many people have the required skill set but are unable to convert that potential into a job because they do not perform very well in the interviews. To do well in your interview, you need to have a good impression on the interviewer. Here are a few things that will help with your interview.
Usually, interviews start with some customary small talk. It is very important to come across as confident during this period and you should appear comfortable to the interviewer. There is a very thin line between being comfortable and too casual, so make sure you do not cross it.
A lot of interviewers observe your body language very carefully. Simple things like your handshake or your sitting posture can convey a lot to the interviewer. But often people end up paying too much attention to their body language and mess up the interview. All you need to do is to smile, sit with your back straight, not move too much in the chair, and try to maintain eye contact with the interviewer.