Marshall Goldsmith's book discusses how successful people's past behaviors that led to success can actually prevent greater success in the future. It identifies 20 common habits that hold leaders back, such as the need to always be right and win arguments, adding too much input in meetings, and making critical comments. Goldsmith advocates getting candid feedback from colleagues and working to stop just one or two problematic behaviors, like speaking when angry, as even small changes can significantly improve how others perceive successful leaders and their ability to achieve more.