1 Preparation
Spend some time to practice with your friend. Examine your CV and see what can be improved.

2 Presentation
Beware of the dress code and dress accordingly. Be more attentive and watch for body language.

3 Anticipation
Anticipate some tough questions and prepare for the answers.

4 Answer smartly
Don't just answer questions, state reasons for your answers

5 Verification
Don't just say "Yes I can do that". Explain how you have done it, or something similar. Try to convince the interviewer to accept your points.

6 Interaction
If the interviewer asks if you have any questions you should try to react and start the dialogue with your interviewer. Whether your question is a brilliant one does not matter.

7 Negotiation
An interview is not a process of you begging the interviewer to employ you. It is a process of you persuading the interviewer that you are the best candidate for the job. Once you have done that, then you can negotiate terms from a position of strength.