As an SEO expert, develop a comprehensive link-building strategy for a tech blog seeking to improve its domain authority. Identify potential backlink opportunities through guest posting, partnerships, and content collaborations. Outline a step-by-step approach to outreach and relationship-building with key industry players. The tone should be strategic and professional, providing a roadmap for enhancing the blog's search engine rankings. Include metrics for tracking the effectiveness of the link-building efforts and adjusting the strategy as needed.