I've just started writing a book on GitHub that intends to offer a bunch of systematic, practical approaches to anxiety, depression, and other mental disorders, as well as a sort of "general take" on how to skillfully live as a human being (under a variety of circumstances). I've literally just started throwing the notes together, but if you're curious to see it evolve from step 1, it's here: https://github.com/brynbellomy/datwantendo

EDIT: so far, it draws from Aikido, Dialectical Behavior Therapy, the psychology of video games and virtual experiences — new additions will continue to be as diverse in origin (hopefully).