All people make mistakes, because our senses are imperfect. However, most often this happens due to the imperfection of our mind: we overestimate our abilities, think in patterns and stereotypes, losing sight of important details. Learning to make fewer mistakes, according to Joseph Hallinan, is very simple: you need to have a good rest, realistically assess the situation and your capabilities, ask for the help of others to check the decision and, of course, learn from your own and other people’s mistakes. But this simplicity also has its secrets. Published in Russian for the first time.