Even if you've got through all those stages, you should think of the face-to-face interview as starting all over again. The first impression you give makes a huge impact with research showing that 33% of interviewers know if they would hire a person within the first 90 seconds! That's just enough time to walk into the room, greet your interviewers and shake hands.
Your most noticeable attributes here are non-verbal - the things you may not even be aware of doing. Things like what you're wearing, how you stand and the way you shake hands convey a lot to those around you.
This video highlights the most common non-verbal mistakes candidates make during job interviews: