We save a special place in our minds for our chronically angry colleagues. No matter what else they do, we brand them as easily combustible. When we talk about them, the first words out of people’s mouths are, “I hear he has a temper.” That hothead image is tough to live down. Given the fact that our efforts to change are judged not by us but by the people around us, you may need years of calm, collected behavior to shake such a reputation. How do you stop getting angry?