Self-doubt can hold you prisoner and leave you wondering if anyone can set you free. In reality, the only person who can unlock your self-doubt cell is you. Of course this doesn’t mean you must go through the process alone. In Carter’s her newest book, Reprogram Yourself for Unstoppable Self-Confidence, you can learn how to squash self-doubt and worry to become a more self-confident version of you. $0.99 on Kindle.