As a recruiter I spend most of my day meeting people and I am constantly amazed at how poorly some people interview. The most obvious things seem to completely pass some people by, stand up when someone walks in to the room, make eye contact, have a firm handshake, be clean and well presented with no overwhelming smell of aftershave or cigarette smoke, be respectful and polite, listen to the questions you are asked and try to relax and see the interview as a way or putting yourself across in the way no CV ever can. An amazing CV is pointless if you can't follow it up in person.