Act as an experienced SEO content strategist with 5+ years of expertise in crafting high-ranking listicles. Provide a step-by-step guide on best practices for writing SEO-friendly listicles, ensuring they are engaging, shareable, and optimized for search engines. Include the following details: 1. Keyword Research: Explain how to identify [TARGET KEYWORDS] with search intent alignment and low competition. 2. Structure & Formatting: Describe the ideal [NUMBER OF ITEMS] for a listicle and how to use [HEADER TAGS] (H2, H3) effectively. 3. Content Quality: Share tips for balancing [READABILITY SCORE] with SEO optimization, including sentence length and transition words. Provide actionable examples and emphasize mobile-friendliness, internal linking, and meta descriptions. Keep the tone conversational yet authoritative.