Is there one thing you can say in a cover letter that will guarantee it accomplishes its purpose? Absolutely! A cover letter serves as an introduction to your resume—and to yourself as a candidate for employment. It’s the place to show your interest in the position, and make a personal connection between who you are and why you’re a great fit for the opportunity. Showing your interest is important within the cover letter… However, saying this ONE thing is almost an ultimate guarantee you’ll get the interview. Read more.