Put on your game face and act confident. Surprising as it may sound, there can be a difference between feeling confident and acting confident. As research on the brain shows, your behavior has a powerful influence on your beliefs and attitudes. A potent way to increase confidence is to simply 'act as if' you are confident. Many people find it helpful to act like a particular role model, even to behave like actors or characters. The point is not to be dishonest about who you are, rather it is to give yourself practice behaving with skill in certain areas where you want to develop better confidence. Over time, with enough practice, you will begin to naturally feel more confident.