Stack Overflow diving for otherwise poorly understood concepts can be a good starting place.

I wish there were more good blogs about testing, refactoring and teamwork on Rails projects. Not idealized forms of it, but talking about real refactors.

If you manage to bridge the gap between the real world and theory, that is wonderful. Show me how in a 100k LOC Rails app that's 10 years old how to refactor my User class to obey SRP and I'll follow your blog for life.