What I’ve learned in these 11 years is you just got to stay focused and believe in yourself and trust your own ability and judgment.

Cuban frames success as a discipline of attention and self-trust built over time. “Stay focused” emphasizes sustained effort amid distractions and setbacks; “believe in yourself” and “trust your own ability and judgment” stress internal conviction over external validation. The phrasing suggests a retrospective lesson—experience has taught him that persistence and independent decision-making matter as much as talent or luck. In a business context, it also implies resisting herd mentality: entrepreneurs and investors often face noisy advice, criticism, and uncertainty, and Cuban’s takeaway is to commit to a clear aim and rely on one’s informed judgment to navigate risk.