Your letter must include your name, address, and contact information. Choose a few phrases in the opening paragraph that let your reader know what to expect in the body of the letter.If qualified for more than one position, apply for each posting. You should use an entrylevel cover letter along with your resume during a job search to make an impactful first impression. Stand out from other job applicants with free, professional cover letter templates. These cover letter templates are perfect for any job or industry. Your goal is to motivate the employer to read your résumé and invite you for an interview. The purpose of a cover letter is to introduce you and briefly summarize your professional background. On average, it should be around 250 to 400 words long. A reader just sent me a cover letter that I can't resist posting, especially because it comes with a "before" version and the "after" version she created.