When you hit a roadblock in your career, it's easy to blame external factors like the economy, the organization, or your boss. But leaders are just as often stymied by their own beliefs about how they need to show up and operate at work, shares executive coach Muriel Wilkins. Through decades of work counseling high-powered executives, she's uncovered the seven main ways that people limit their own success and has advice on how to overcome those mental blocks. Wilkins is author of the HBR article "The Hidden Beliefs That Hold Leaders Back" and the book Leadership Unblocked: Break Through the Beliefs That Limit Your Potential.