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 express.
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.
Say thank you to your interviewer at the end and after by email or send a 'thank you' letter by post.
Do not use unprofessional words.
Advice for Job-hunters:
"While going through your CV, ask a few friends to have a read of it before sending to a new company. When you spend time on things for a long while, your brain can alter the words you are seeing without knowing it."