This document discusses best practices for email marketing and newsletters. It notes that successful emails provide a variety of content like reminders, surveys, promotions and industry information through a strategy of gathering email addresses. Common mistakes include newsletters that are cluttered, support too many aspects of a business or are unfocused. Tips provided include balancing content as 90% educational and 10% promotional, setting clear expectations, using creative subject lines, having a single call-to-action, making unsubscribing easy, testing frequently and providing examples of good email marketing.