Take time to review their job postings online or in the newspapers about the position that you're aiming for. Each posting usually has a brief description about the company and position available. Take note of the keywords listed in these ads, and match them to the bullet points in your resume. Chances are that most of these key words are already in your cover letter, however if you have missed any, add them to your CV. Creating a more custom resume will greatly increase your chances of an inter, as you will be a better match for the eyes of your potential employer.