You rock a presentation, get great comments from your manager, and still leave wondering whether everyone is overestimating ...

Whether you’re feeling proud of yourself after a major accomplishment or feeling down on yourself after a day when you can’t seem to get it right, the way you talk to yourself matters. That’s the idea ...

Does repeating a positive phrase called an affirmation out loud or to oneself change one's feelings or behavior? Some psychologists believe the answer to this question is yes. Others remain skeptical.