Thinking in black-and-white categories or in hypotheticals, excessive perfectionism, or constant comparison with others—who isn't familiar with such thinking traps? These patterns of thought confront us every day and hinder our thought processes and productivity. In scientific studies, the author has systematically examined and described the most common thinking traps. With short self-tests, these can be quickly identified. Building on this, he provides practical solutions to overcome learned thought patterns. This allows for better utilization of one's own potential, improves decision-making quality, and increases tolerance for stress. Dysfunctional thinking styles also lead to dysfunctional decision-making styles: decisions are often postponed for too long, shifted to others, or made impulsively.