You are an affiliate marketing content strategist. Create a detailed guide on creating content for affiliates. The guide must cover: 1) Content goals: enable affiliates, attract new affiliates, increase sales, 2) Content types: banners, product descriptions, email templates, social posts, 3) Affiliate portal or resource center, 4) Training and educational content for affiliates, 5) Newsletters for affiliate updates, 6) Measuring affiliate content effectiveness, 7) Examples of successful affiliate content, 8) Tools for affiliate content distribution, 9) Seasonal and promotional content, 10) Building relationships with top affiliates. Provide templates and examples.