This book was recommended, amongst others, at a talk I went to at a conference, and, since I found what the speaker said interesting, I thought I'd check out the books he gathered ideas from. However, his 2-sentence summary of what's important from this book was way better than the book in its entirety.
The most interesting takeaway (and there are other points made in this book which I will not reiterate) is: When you think of everything as a system, often made up of subsystems, you can investigate them in an organized fashion, fixing each little part one at a time, until you improve the whole system, becoming more efficient.
Or, in other words, use your brain and thinks through logically, always trying to improve, rather than being reactionary and chaotic.
It's not really a huge revelation (despite how many times the author, who is a self-admitted relentless repeater of information to "help it sink in", claims it to be. Part of the problem, is that he's awfully abstract about it all, and when he's not abstract, he's talking about his old-fashioned seeming message-center business. I mean, there's something there... being mindful and approaching things systematically is a good idea — but there is nothing compelling about the way this is spun out into a dull, repetitive book with tangential trips into prosaic and obvious topics like making a point to work at the time of day when you feel biologically most on the ball.
I think the liner notes to Robert Fripp's 1984 record "Let the Power Fall" are way more useful than this book (reproduced here for your convenience):
I
1. One can work within any structure.
2. One can work within any structure, some structures are more efficient than others.
3. There is no structure which is universally appropriate.
4. Commitment to an aim within inappropriate structure will give rise to the creation of an appropriate structure.
5. Apathy, i.e. passive commitment, within an appropriate structure will effect its collapse.
6. Dogmatic attachment to the supposed merits of a particular structure hinders the search for an appropriate structure.
7. There will be difficulty defining the appropriate structure because it will be always mobile, i.e. in process.
II
8. There should be no difficulty in defining aim.
9. The appropriate structure will recognize structures outside itself.
10. The appropriate structure can work within any large structure
11. Once the appropriate structure can work within any large structure, some larger structure are more efficient than others.
12. There is no larger structure which is universally appropriate.
13. Commitment to an aim by an appropriate structure within a larger, inappropriate structure will give rise to a large, appropriate structure.
14. The quantitive structure is affected by qualitative action
III
15. Qualitative action is not bound by number
16. Any small unit committed to qualitative action can affect radical change on a scale outside its quantitative measure.
17. Quantitative action works by violence and breeds reaction.
18. Qualitative action works works by example and invites reciprocation.
19. Reciprocation between independent structures is a framework of interacting units which is itself a structure.
20. Any appropriate structure of interacting units can work within any other structure of interacting units.
21. Once this is so, some structures of interacting units are efficient than others.