Don't rely on hierarchy. Earn others' trust as you would when you are an equal. Don't expect deference just because of your position. Although hierarchical decision making may be more efficient, it's an unnatural system and anti-social and easily generates animosity. You'd do better to empower your peers instead, and show them you are able to listen to them as well. Just like you would with friends.
No. Never accept responsibility without power. That is a lesson I wish I'd learned much earlier in my life.
This, and use power sparingly.