Don't be a perfectionist, because perfectionists often spend too much time on little differences at the margins at the expense of other big, important things. Be an effective imperfectionist. Solutions that broadly work well (e.g., how people should contact each other in the event of crises) are generally better than highly specialized solutions (e.g., how each person should contact each other in the event of every conceivable crisis).
Ray DalioPeople who excel at book learning tend to call up from memory what they have learned in order to follow stored instructions. Others who are better at internalized learning use the thoughts that flow from their subconscious. The experienced skier doesn't recite instructions on how to ski and then execute them; rather, he does it well "without thinking," in the same way he breathes without thinking. Understanding these differences is essential.
Ray DalioMeditation helps you stay in a calm, clear-headed state so that when challenges come at you, you can deal with them like a ninja - in a calm thoughtful way. When you're centered, your emotions are not hijacking you.
Ray DalioAsk yourself whether you have earned the right to have an opinion. Opinions are easy to produce, so bad ones abound. Knowing that you don't know something is nearly as valuable as knowing it. The worst situation is thinking you know something when you don't.
Ray DalioI learned that everyone makes mistakes and has weaknesses and that one of the most important things that differentiates people is their approach to handling them. I learned that there is an incredible beauty to mistakes, because embedded in each mistake is a puzzle, and a gem that I could get if I solved it, i.e. a principle that I could use to reduce my mistakes in the future.
Ray Dalio