The document lists 20 habits that can hold people back from achieving higher levels of success. These include an excessive need to win, add one's opinions, judge others, make negative comments, explain why ideas won't work, withhold information, fail to recognize others, take credit that isn't deserved, cling to the past, make excuses, play favorites, refuse to express regret or gratitude, punish messengers, pass blame, and prioritize being oneself over professional growth. Adopting these habits can prevent career advancement by damaging relationships and hindering personal development.