In the body paragraph you will basically express your interest in taking admission. Important things you are going to mention include the basis for applying to the school. Why do you think this school can build up your career? List down all academic achievements and special skills that would help in making your letter stand out from rest of the applicants.At the end you should sign off with "sincerely yours" or any other related salutation.If you are applying for a particular job then you need to create letter of intent that contains the following.
Athletics: When a high school senior decides on which college he or she would like to attend and receive an athletic scholarship to do so, a letter of intent is signed. Many sports even have a national signing day to keep the playing field level.