Specify your career goals and why you would like this role.
Don't brag too much. Being humble is powerful.
Don't be scared to say you don't know the response to questions. Don't lie.
Make a good first impression, be polite with everyone you meet. Stand up, smile, make good eye contact.
Dress smartly. Be smart and groomed.
Job Hunting Tips:
"Read a paper or relevant blog that writes about the niche you're looking for a job in. This will make sure that you're up to date about movements in the field and will also be useful in an interview and shows the possible company that you have taken the time do so."
Some useful things would be:
Self-motivated, with strong desire to succeed
Friendly nature with an excellent telephone manner