Some of these principles are directly from the book, either as a quotation or a paraphrase. Others are implied by the book, but not stated outright. I've included my own commentary in italics on some of them. Since this is published as a list, I think that one of the most important "mindset principles" that Kageyama lists is that fundamentals are not a checklist that you can run through during every move of a game. They need to be internalized so that they arise naturally in your play. This does not mean playing purely by intuition (his emphasis on reading is too great to take that away from the book!), but it recognizes that there is not time to run through a list on every move. Still, every move should be true to the fundamentals.
In no way is this list of fundamentals a substitute for reading the book. First of all, I'm sure there are things I have missed: I know that I would not have caught all of the implied fundamentals when I was weaker, and I am sure there are still more I am still missing. Second, Kageyama's tone is a big part of the enduring attraction of the book; he may be able to motivate you in ways that I cannot. Finally, I'm sure there is a reason he didn't choose to distill his thought into list form. It doesn't seem like it would fit with his instructional style.
I'm in chapter 4 right now, so this list is not yet complete. I'll post more as I read further in the book. I've included page numbers; they are from the 2007 reprint of the English edition published by Kiseido.
- "When it looks as if you can capture something, hold up two fingers and ask yourself: (1) Can I catch it in a net? (2) Can I catch it in a ladder?" (34)
- When you make a move, read what will happen instead of just hoping it works. (34) It's ridiculously easy to fall into the trap of playing a move without reading its result. Sometimes I can find myself playing a couple of moves just to simplify the reading problem, but if I can't achieve my aim those moves are wasted and likely strengthened my opponent.
- Corollary to the above: You can get better at reading. Don't be lazy; practice reading. (19)
- Study patiently, little by little, and expect great effort to become better. (22)
- When capturing a stone or group of stones, play the move that captures it most firmly. (23)
- Make a plan and execute it. Don't play wishy-washy moves. (40) I'm definitely guilty of playing moves that don't commit me to one path or the other. This can seem wise, but when my opponent can dictate the direction of the game that stone might end up in the wrong place.
- Play with confidence. (39)
- Play moves you understand. (69) I think this is also an invitation to continually expand our understanding.
- Moves must take into account the balance of the whole board. (38)
- Go is a game of connection. Make moves that keep your stones connected and cut your opponent's stones apart. (47) So basic, but so important.
- Don't peep where you can cut. (42)
- Get ahead in running battles as soon as you can. (70)
- Practice enough to make the fundamentals a subconscious element of your play. (50)
- Do not play moves without regard to the surrounding conditions. (61)
- Complete sequences. (58)
- Don't undervalue thickness. (58)
- Play the natural move. (62) This sounds like non-advice, but I think pushes back against the tendency to look for some clever move your opponent never saw coming. Normal moves are enough.
- Pay attention to what your opponent is trying to do. (62)
- Josekis must be selected to fit the occasion. (64) A specific application of looking at the surrounding conditions. This also serves as an admonition to me: don't play a joseki I know if the result is bad globally. Better to try to make up my own moves and learn than stick to a pattern that doesn't make sense.