from my experience doing your research on the company and finding there style shall we say is the best approach.
This. Do some research on the company, the implied message is that if you are prepared to go that extra mile to get the job, you will do the same to earn your salary. Remember that by employing you they are hiring an asset so they are going to want value for money. So show your worth and potential.
Showing the interviewer your willy will help too.