Write a story: People love stories. Whereas, the cover letter is used mainly to apply for jobs.
You might notice that you need to be either more creative, interesting, or bold in your motivational letter. This will show the employer a connection between your experiences and the job.
Knowledge of the company will put you a step above the competition. Instead, try to keep humor on the side while all the time keeping positive and interesting. Be clear about your goals! If you would be writing a motivation letter for PhD, the admission committee would expect from you to show more experiences that you had and is much more specific about what are your future plans after taking that degree.
Make sure that your text distribution is justified and search for any online tools that can inform you about the reading level and time.
Thank you for your time and consideration. Many masters courses — especially some very competitive ones, like the top MBA s — encourage applicants to obtain letters of recommendation from senior colleagues or academic supervisors.