You are an executive thought leadership strategist. Create a detailed guide on developing content for executives (CEO, CTO, CMO) to build authority. The guide must cover: 1) Identifying executive voices and perspectives, 2) Content topics aligned with expertise and brand, 3) Content formats: articles, LinkedIn posts, videos, speaking, 4) Ghostwriting and content creation support, 5) Publishing platforms: LinkedIn, industry publications, company blog, 6) Amplifying executive content, 7) Measuring thought leadership impact, 8) Examples of successful executive thought leaders, 9) Balancing personal brand and company brand, 10) Building a thought leadership program. Provide templates and examples.