How to write an impressive cover letter for an entry level IT job?

A lot of people will tell you to find examples of cover letters, follow a format, be formal, etc. ..... I HATE this approach and so do others... I've actually seen job ads before that said "Send us a cover letter (not too dry)" and "In your cover letter, tell us a joke since we get bored around the office" My cover letters include a sentence or two of who I am and why I should get that particular job. Followed by a paragraph of my background and what I can do for them. I follow that up usually with some kind of unique statement and some contact information. I've even included in cover letters before (I'll call you at 8:45am on Friday to set up a chance for us to talk) It really all depends on the job. The goal of the cover letter is to make them read the resume.

I can't believe that you never had to create a resume during college. If you are asking ANSWERS, how are you going to handle situations at work that won't allow you to ask others for the solution? I'm not trying to be mean but, SERIOUSLY!!!