Awesome list for self-study! If you work in a sufficiently large organization, or are well-connected enough to sit and chat with the breakers, get them into a room, and drill them about their processes, their information sources, and their mindset.

Beyond the deep, technical knowledge you'll gain following daeken's recipe, there's a whole set of security thought and security models you'll need to learn. It's hard to figure out and differentiate between threats unless you can think like an attacker, then work a system like an attacker does.