Objective Thinking
"The first principle is that you must not fool yourself — and you are the easiest person to fool." — Richard Feynman
Adapting Objective thinking in your mental models will change your life. Literally. When i first come across "first principles thinking" it altered my brain chemistry and made it hard for me to go back who i was before. My mind switched from subjective thinking to objective one. What is the absolute truth/fact that you know about this problem to make an decision? This eliminates 90% of preconceived assumptions and sentiments making it clear for you to think through. When things happen to you, pause. see and accept the reality/truth. tackle it head on without creating emotional excuses. The key is to accept a problem as it occurs and not take it personally. Thinking Objectively and surrounded by objective people will lead you make better decision more often than not.
And remember what Richard Feynman said.