A cover letter should answer, "Why should the employer hire you? Always write a cover letter from scratch.Always aim to be answering the question of "Why should we hire you?" and back up everything you say with specific examples from your background. Your cover letter should articulate your qualifications and motivation for the position. Read the job description closely and research the organization. You're not writing a whole new letter. So you're going to have a template. A cover letter serves as an introduction to your resume. There are two types. Highlight 1 or 2 specific accomplishments but do NOT repeat your resume.