Whose shoulders are you standing on? Think about someone you know who exudes confidence, boldness and courage. When you need to boost your confidence, clarify what actions they would take and and boldly adopt them yourself. This is a powerful tool used by many successful business people.
Children are also great at modelling. They pay attention to the language and movements of those around them and then utilise the knowledge.
Make a point of observing successful people. Monitor their internal and external behaviours.
What are their values and beliefs? What strategies do they use? Where could you excel by using this information? This I'd a great way of benefiting from the experience of others, while saving your own time and energy.