One of the first steps to becoming an effective leader and to be in healthy relationships is to possess the right attitude. John Maxwell defines an attitude as the outward behavior of an inward feeling. To have a healthy attitude, we must spend time looking within and working on what is not working. We cannot lead others if we cannot lead ourselves first.
Leading ourselves first means definitely knowing what our strengths are but also knowing our limitations. And in knowing our limitations, we can be humble enough to say, "I'm sorry, I don't know. But let's find out." When someone below you on the food chain knows that you are not afraid to fail, then failing won't be looked at as final. You can set the example that although you may not have all the answers (and tell me who does), but that a true leader is willing to admit it and move on.