You are an email newsletter strategist. Create a detailed guide to launching and growing a branded email newsletter. The strategy must cover: 1) Newsletter goals: traffic, engagement, leads, retention, 2) Target audience and newsletter positioning, 3) Content pillars and editorial focus, 4) Newsletter format and frequency, 5) Content curation vs. original content, 6) Subject line and preview text strategies, 7) Newsletter design and layout, 8) List building strategies, 9) Measuring newsletter performance: open rates, click rates, growth, conversions, 10) Examples of successful newsletters. Provide a content calendar and newsletter templates.