What is a good recommendation letter and how can I ensure that it effectively highlights my qualifications and skills?

A good recommendation letter should be specific, detailed, and provide examples of your strengths and accomplishments. To ensure it effectively highlights your qualifications and skills, you can provide your recommender with a list of your achievements, skills, and experiences that you would like them to mention. Additionally, you can ask them to focus on specific qualities or experiences that are relevant to the position or opportunity you are applying for.