It's important to keep reaching new audiences in new ways. In 2006, I set up the educational website Explain that Stuff, where I publish around 400 free science and technology articles. By September 2015, the site was serving over 1.6 million pages a month to around 800,000 readers, with traffic equally divided between North America, Europe, and Asia, and has clocked up well over 20 million "page views" so far. It's been particularly exciting to see Explain that Stuff reaching so many young, would-be scientists in Africa and Asia, parts of the world long neglected by traditional western publishers.
The site has proved popular—and not just in terms of visitor numbers. When Wikipedia (the default source of reference) clutters, quibbles, and confuses, people warm to clear, simple, engaging explanations that instantly make sense. 95 percent of readers sending feedback have rated the articles either "excellent" or "good". Articles and artworks from the site have been widely reused by schools, colleges, universities, exam boards, scientific organizations, environmental groups, and educational publishers.
In 2011, I added a Facebook page to the site, where I publish fun science snippets several times a month.