Can you remember the last time that you were wrong? How did it feel to discover your mistake? Do you remember the cause? Could your actions have been built on a false assumption? We all make assumptions from time to time. It's when we live in the world of assumptions that we really get into deep trouble. The more we assume, the easier it is to take comfort in our assumptions. But, our assumptions are often wrong. When we're leading a team, developing performance, running a project and doing the important work of a leader we need to check our assumptions at the door. We need to test our thinking and clarify our expectations. High performance leaders identify and test any assumptions before launching a project or reaching a major decision. After all, isn't it better to spot your mistakes before you make them? -- Doug Smith