I'm going to keep this post updated with additional resources as I find them – mostly to have a list of the things I haven't done yet.
1/ theodinproject.com I figure that I should put something in my portfolio that is comparable to what others have done? This might be lower level (I don't know yet), but, much as rebuilding nerdique will be interesting and character-building, I haven't decided if I want it to be public.
2/ https://github.com/kamranahmedse/developer-roadmap – for identifying gaps