User psychology, especially as it applies to product design and marketing in startups, is underrepresented in formal and online education, imho. I’ve been a long-time reader and fan of @nireyal since before I met him for dinner nearly 2 years ago. That dinner turned into a fun side project, helping him with his book, Hooked: How to Build Habit-Forming Products (new updated release is coming shortly).
There are some smart folks curating the weekly course (similar to the popular design-focused Hack Design project), including @joshelman, @alexbaldwin, and @JamieMadigan.
Product Hunt