The Minto Pyramid Principle: Logic in Writing, Thinking, & Problem Solving by Barbara Minto (http://www.amazon.com/Pyramid-Principle-Writing-Thinking-Pro... (http://www.amazon.com/Pyramid-Principle-Writing-Thinking-Problem/dp/0960191046)) Some Mental Models are available here for free : http://www.focusinvestor.com/FocusSeriesPart3.pdf http://www.focusinvestor.com/MungerModels.pdf For systems : Lean Thinking by James Womack -------------- Some thought provoking personal effectiveness titles : The Four Agreements by Miguel Ruiz (http://www.amazon.com/Four-Agreements-Practical-Personal-Fre... (http://www.amazon.com/Four-Agreements-Practical-Personal-Freedom/dp/1878424319)) The Paradox of Choice: Why More Is Less by Barry Schwartz (http://www.amazon.com/Paradox-Choice-Why-More-Less/dp/006000... (http://www.amazon.com/Paradox-Choice-Why-More-Less/dp/0060005696/)) The Power of Full Engagement by Jim Loehr and Tony Schwartz
Also recommended in this reply