Choose the most appropriate recommender: It could be a colleague, an academic faculty member, a direct supervisor or a mentor who can provide a recommendation for you, discussing your worth and contribution.

Be exact in mentioning your achievements: Make sure to emphasize certain successes like practical work experience, internships, projects and so on.

Ensure the proper structure of the document: Keep the end result concise (one page maximum), well-structured and compliant with the university requirements.