Photo from the DotJS2019 talk Develop, Debug, Learn?
The Developer Advocacy Handbook
This handbook will get you on the way to be a great developer advocate for any product or company. Naturally, your approach may need tweaking for different markets and audiences - and in accordance with your own personality - but the main principles are the same for everybody and anywhere in the world.
This is a new, 2020 version of this 11 year old book and I added quite a few new chapters and removed outdated materials. You can read more about this in the about section.