This book is intended to help you enhance your common sense (your intuitive decision making skills) as well as your critical thinking skills (your rational planning and decision-making skills). A big claim, to be certain, but undoubtedly a valid one. As you are aware, your common sense, and with it your ability to make many decisions almost intuitively with minimum thought, is vastly better today than it was when you were a teenager. Experience and learning that translated itself into better judgment and reasoning ability, accounts for this change. More precisely, new knowledge led to thought habits that became so solid that you spend hardly a moment on decisions to which they apply. That is how common sense and judgment mature. Practicing the relatively simple formula that this book offers, and developing the habit to apply it regularly, will help you take another quantum step toward a higher level of common sense and intuitive reasoning when you develop plans and make decisions. At...