You should always project confidence and then figure out what you don't know afterwards. Also, you have to have good judgment in whom to share self-doubts or intimate thoughts with. You are successful when you have balance and happiness whether at work, at home, or both. You should always have a mission in life, allow yourself to get excited about changes, and never settle for boredom. Working, like parenting, offers great opportunities to learn and grow as a person.
Good mentors listen well and are confidence builders.
They provide subtle guidance but don't shield you from opportunities or mistakes, and they share their wisdom without feeling threatened. Hire and utilize good people. In everything, don't sacrifice quality for volume. Also every day find 20-60 minutes of quiet time just for you. Use this time to think through what's required for the rest of the day and adjust your attitude to feel confident, in-control and prepared.