One leadership failure that will stifle you, is your lack of vulnerability. In any individual coaching, or group coaching, have the willingness to be vulnerable. Colin Powell answered a reporters question about vulnerability with "Show vulnerability, until you can no longer be vulnerable."
Essentially, show that you're human. If you're cold, you're cold. If you're tired, you're tired. Do so, until you no longer can be due to the seriousness of the situation you're at.