Purdue University Online Writing Lab: "Writing Your Cover Letter"
Use the Purdue Owl Resources to create a cover letter for a job posting you are interested in. Work through all five light orange tabs on the left side of the page, entitled, "Cover Letter Headings," "Addressing Cover Letters," "Cover Letter Introductions," Cover Letter Body Paragraphs," and Cover Letter Closings."
As you read through each tab, create that section of your own letter, using information about the actual company and job you are interested in. Just like your resume, it is a good idea to have a knowledgeable person review your first few cover letters, until you have mastered this skill.