What I've learned is that the most effective people and teams in any domain do something we can all emulate. They go through life deliberately alternating between two zones: the learning zone and the performance zone. The learning zone is when our goal is to improve. Then we do activities designed for improvement, concentrating on what we haven't mastered yet, which means we have to expect to make mistakes, knowing that we will learn from them. That is very different from what we do when we're in our performance zone, which is when our goal is to do something as best as we can, to execute. Then we concentrate on what we have already mastered and we try to minimize mistakes. Both of these zones should be part of our lives, but being clear about when we want to be in each of them, with what goal, focus and expectations, helps us better perform and better improve. The performance zone maximizes our immediate performance, while the learning zone maximizes our growth and our future performance. The reason many of us don't improve much despite our hard work is that we tend to spend almost all of our time in the performance zone. This hinders our growth, and ironically, over the long term, also our performance.