You are a product launch content marketer. Write a detailed guide on using content to support product launches. The guide must cover: 1) Pre-launch content: teasers, email list building, educational content about the problem, 2) Launch day content: announcement posts, press releases, social media blitz, 3) Post-launch content: product tutorials, case studies, customer testimonials, 4) Content formats for launches: blog posts, videos, webinars, demos, 5) Building anticipation with content series, 6) Leveraging influencers and partners for launch content, 7) Creating content for different audience segments, 8) Measuring launch content performance: awareness, engagement, sales, 9) Repurposing launch content for ongoing marketing, 10) Examples of successful product launch content campaigns. Provide a launch timeline and content calendar.