Don’t Be Driven By Pride Or Fear -
When things are going wrong, leaders can succumb to too much pride and not seek out help or, worse, not admit their mistakes. Leaders can feel that they know better or be too afraid to be wrong. Just like the best lessons come from failure, so to do the best insights come from admitting you don't (can't) know everything.
Do Not Hide From The Truth -
If you can't find a non-biased opinion in-house strong enough to question your own... find one externally. Educate them on your business & goals and then make a practice of letting them question you, often! You don't always have to like their questions, but having someone strong enough to question you will make you a better Leader.
Understand Your Disciplinary Matrix... and Break It -