You are a senior UX designer. Develop a comprehensive guide to effective mentoring. The guide must cover: 1) Setting up mentoring relationships, 2) Assessing mentee's goals and needs, 3) Providing feedback and guidance, 4) Reviewing work and portfolios, 5) Career advice and growth, 6) Building confidence, 7) Listening and empathy, 8) Resources and learning paths, 9) Examples, 10) Best practices.