1. Who you are
Some applicants make the mistake of assuming that they do not need to include “basic” things (e.g. education) that are already in their CV. This is unwise and makes it difficult for the employer to assess you accurately. A winning cover letter should contain everything you want your employer to know, the main “meat” of your application with all your best and most relevant accomplishments and experience. Your CV is the backbone of your application, containing a chronological history of your experience and providing details.
Thus, a winning cover letter begins by introducing who you are, your academic background and what job you are applying for.