Thoroughly research the employer
Before any type of interview, understand the organization/company and their short and long term goals to the extent that you can from the resources available. This will not just improve your interview performance but also allow you to ask good and memorable questions during the interview.
Remember that almost all interviews provide candidates with the opportunity to ask questions. This is important time for you to demonstrate to the employers that you have taken the time to research their company and the job. However, it is also a time for you to assess if you would like to work with such a company.