Marmion: -Browse websites of potential employers.
-Personalise your CV and cover letter to each individual employer/position.
-Get your CV and cover letter checked by someone like a careers councilor (your university should offer this service).
-Search for any relevant news articles where the employer is mentioned.
-In the interview(s), show knowledge and interest in your employer, but don't go overboard. Be confident, assertive, but deifinately not 'cocky' or arrogant.
-An interview is as much an opportunity for you to learn about your employer and their work environment as much as it is for them to assess your confidence, competance, characteristics and suitability for the role.
Without wanting to "put down" Marmion, I've highlighted Marmion's spelling errors, personally when receiving a large volume of job applications, any more than one spelling or a major grammatical error in the covering letter can be sufficient for me to immediately reject that application.