If you're in pursuit of an outstanding entry level position, you need to know the truth about cover letters.
Cover letters are extremely limited in value, even when used properly.
First, most people assume that the cover letter is actually read before the resume. In my review of over 20,000 resumes, I've probably read only 4,000 cover letters, and that was done only after finding strong interest in the resume. It's actually rather amusing to watch a Hiring Manager reading his mail. The cover letter and resume are pulled from the envelope, the cover letter is immediately placed behind the resume, and the resume is reviewed. Usually scanned first, then read.