Confidence-building is a virtuous cycle. No one but you is in the driver’s seat. All you have to do is buckle up and try something you've never tried before, something you’re not sure you can do, something that scares you. Speak in front of a live audience. Take on a 5K. Stand up for yourself when you need to. Then try something else new. Do it again and again until you know deep down in your bones that you’re unstoppable, like there’s nothing you can’t do.