The first thing I want to say about cover letter format is when it comes to cover letters one size most certainly does not fit all. Although you can and should follow a format with your cover letter you should individually tailor each cover letter towards the job that you are applying for.
Imagine a recruiter opening your cover letter to discover a title that addresses his top problem. How much more attractive will your packet seem? Go do two things right away: 1. Google "Johnson box for business letters" and learn about this terrific device, then 2. Brainstorm 7 headlines you could use for your cover letter format. With the fierce competition in this job market, having 113 applications on the street does you no good at all if each of them is mediocre. There are so many candidates, just one or two of them will create great packets and beat you every time.