@SurfNTurf- I bought a book of cover letter samples at Barnes and Nobles years ago and I still use it. It shows you the various cover letter formats so that you get a general idea of how to set one up.
You can also look for cover letter templates online too. There are many sites that offer cover letter examples that can help you draft your own.
The sample cover letter should contain about two paragraphs. You should offer a little information about your experience and how it pertains to the job that you are applying for.
This creates a mental note in the employer’s head about you that might cause them to call you for an interview.