While every cover letter is different, effective cover letters demonstrate you are a good fit for the position. Include a thesis statement outlining the reasons why you are applying for this job and what makes you an excellent candidate.A cover letter is the first thing employers see when sifting though applicants, making it just as important as your resume. Many candidates neglect to submit cover letters but a cover letter can provide you with an opportunity to stand out and show you are serious about the position. Successfully written cover letters consist of an outline, a draft and then a final review. It is important that you give each step in the process attention. The majority of your cover letter should state your achievements and experience. Your letter should demonstrate a thorough understanding of the position and the needs of the employer. Step 3: Analyze the Job Description. Crafting a well-structured and persuasive job application letter is essential when seeking employment opportunities.