Do not merely read through your CV. An interview is an opportunity to present all of the skills you have that your CV can not communicate.
Stipulate the goals of your career and the reasons you prefer the position.
Don't go off topic. Keep your brain on the things you are good at.
Eat properly before - don't have stinky ingredients!
Do not use unprofessional words.
Make sure that latest twitter and linkedin messages are work-friendly.
Advice for Job-hunters:
"Read a paper or relevant blog that concentrates on the niche you're looking for a role in. This will make sure that you're relevant on updates in the field and will also be useful in an interview and tells the possible company that you want this job."