It might be difficult to let go of old ideas and comfortable situations, but if you're going to succeed in a leadership role, you have to be willing to be adaptable. If everyone is looking to you for the answers, you better be prepared to give them. And if you don't know the information they're asking for offhand, you better start figuring out where you can attain it. Once you truly believe you're the right person for the job, very little will stand in your way.