A good handshake
Pronounce the interviewer's name Properly.
Let the interviewer talk don't interrupt.
Good eye contact with your interviewer.
Smile. Look as if you are enjoying the conversation.
Mirror your interviewer's body language.
Keep all your answers positive.
Listen carefully to the interviewer's question.
Get the interviewer to see you in the job by responding to questions with examples that put you in that position.
Don't over-sell here.