The document provides guidance on how to write an effective reference letter, including its structure, content, and tips. A reference letter should include an introduction explaining how the author knows the applicant, 2-3 paragraphs describing the applicant's qualifications and how they match the job, and a conclusion recommending the applicant. Sample letters are also included to illustrate these points. When requesting letters, give writers sufficient time and suggest what to include to help the applicant achieve their goals.