I’ve been a fan of Shane Parrish and his indispensable Farnam Street for many years now. Shane is a fascinating person — he’s a former cybersecurity expert for the Canadian intelligence agency and occasional blogger who turned his website into a full-time career. Oh and fs.blog is on WordPress, too.
His book, The Great Mental Models: General Thinking Concepts, has been tremendously valuable to me in my work. So valuable, in fact, that Automattic is now sponsoring the next printing of the hardcover edition. You can pre-order it here, then learn more about the mental models outlined in it.