Knowing how to write a cover letter will make the difference between landing a job interview or not. Although not all job postings require a cover letter, sending one is what will actually make the recruiter or hiring manager open and view your job application. You might have an impressive resume but if you are just sending a dry email, without selling yourself, chances are that nobody will do the effort to open the attached resume. A good trick to increase your chances of your application being viewed is writing the cover letter in the body of the email.