Create a Google Alert on the employer to know latest developments.
Don't stress yourself by thinking about negative thoughts.
Think of honest questions to demonstrate you're curious and have researched.
Don't go off topic. Keep your brain on the things you are good at.
Get there in time, to feel calm and ready for a great meeting.
Sit down, be calm, take a few minutes to ready yourself ahead of going through the door.
Do not merely read through your CV. An interview is an opportunity to deliver all of the skills you have that your CV can not communicate.
Advice for Job-hunters:
"Before you apply, make sure you unearth information about your prospective employer. Understand exactly what they do, their sector, their competition and principles. Stay on top of any issues or news in the sector."