Research:
1. The exact time and location of the interview.

2. The interviewer's correct title and pronunciation of his or her full name.

3. Specific facts about the: 
Company plant, 
Office or store locations,
Products and services,
Recent business growth,
Growth potential for the future.

There are also a number of helpful documents and research publications:
The company's website.
The company's annual reports.
Hambros Company Guide.

4. Facts and figures about your present or former employer. Refresh your memory on this as you will be expected to know a lot about a company for which you have previously worked.