Teaching classes. It's not worth self-marketing, unless you're a freelancer (in which there's economy of scope). Find people doing classes, offer to teach. If y

Teaching classes. It's not worth self-marketing, unless you're a freelancer (in which there's economy of scope). Find people doing classes, offer to teach. If you can teach for certifications, there's plenty of work out there. Writing books is not worth it. Writing the whole syllabus for a class isn't either. Use an existing one. Mentoring for hackathons or doing speeches in universities pays pretty well even at a token fee. I think there's some value in doing and maintaining template code or a recipe book. I've gone through a lot of pain trying to write tests for a certain config, and just forked out money for examples.