Do not go off topic. Keep your thoughts on the things you are good at.
Think of meaningful questions to express that you're curious and have thought about the company.
Make a Google Alert on the firm to know latest developments.
Don't be late. Prepare for delays.
Put on a clean suit. Wear it sharp and clean.
Try not to talk poorly about current team mates, directors or suppliers.
Learn regularly asked questions and rehearse your replies.
Suggestions for those looking for employment:
"One step at a time. Remember that your CV will not get you the job on its own. Its purpose is to get you the interview. Make sure your CV will pique the employers’ attention so that you can get the first interview - and then that is where you will get the job."
Key things for this position:
Excellent attention to detail
Have a 'can do' mentality, prepared to help out team mates in a cooperative approach
Is able to operate under extreme stress
An aspiring and enthusiastic ethic
Relevant background in a related job and over one years' involvement in this industry