Talent can open doors. Connections can get someone in the room. Luck can certainly help. But billionaire “Shark Tank” investor Mark Cuban believes the trait that separates successful people from everyone else is something far less glamorous and entirely within their control.
Effort.
Cuban has built a career spotting opportunities and evaluating people who want to turn big ideas into successful businesses. His advice for anyone hoping to get ahead is surprisingly simple. Stop worrying about everything that cannot be controlled and focus on the one thing that can.
“The one thing in life you can control is your effort,” Cuban said on the “In Search of Excellence” podcast with Randall Kaplan. “And being willing to do so is a huge competitive advantage, because most people don’t.”
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That might sound like familiar motivational advice. But Cuban’s definition of effort goes beyond clocking extra hours or staying late at the office. It means taking ownership of problems, paying attention to details, and continuing to look for answers when everyone else has moved on.
Effort is key to career success, says Mark Cuban
Cuban has a straightforward way of explaining the difference between employees who stand out and those who simply check the boxes.
Some employees are given three tasks and complete those three tasks without noticing the other problems sitting right in front of them. Others want to discuss every big-picture possibility but struggle to get the basics right.
The most valuable employees, in Cuban’s view, can handle both. They complete the assigned work while looking for what else needs attention. They investigate problems, explore possible solutions, and take initiative without waiting for someone to spell out every next step.
During the podcast, Cuban explained that an entrepreneur needs to be willing to search for an answer, even when the solution isn’t immediately obvious. If there is no answer, the work should at least establish why.
His message to people who aren’t prepared to put in that effort is blunt.
“Don’t apply for a job with me,” Cuban said on the podcast.
It is a tough standard, but it reveals how he evaluates potential. Completing an assignment is the starting point, not necessarily the finish line. The ability to spot what others miss and keep working toward a solution can make an employee far more valuable.
Why effort gives employees a competitive advantage
Cuban’s argument rests on a basic reality of work and business. Plenty of factors that influence success are beyond anyone’s control. Market conditions change, customers behave unpredictably, and even strong ideas can fail.
Effort offers more room for action.
That doesn’t mean working the longest hours automatically makes someone the best employee. Nor does it mean that hard work guarantees a promotion, a successful company, or a fortune. Effort is most useful when it is directed toward meaningful goals, sound decisions, and better results.
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The difference is between being busy and making progress.
An employee who spends hours on a task without questioning whether it solves the actual problem may accomplish less than someone who identifies the right issue, tests a solution, and learns from the outcome. Cuban’s approach puts the emphasis on persistence and problem-solving, rather than simply looking occupied.
For entrepreneurs, that mindset can be especially useful. Building a business often means facing questions that don’t come with an instruction manual. The willingness to keep researching, testing, and adjusting can help a founder uncover opportunities that a less persistent competitor overlooks.
Mark Cuban says your effort sets you apart from everyone else.
Research shows a link between work effort and job performance
Research offers some support for Cuban’s view, although it does not establish effort as the only ingredient in success.
A meta-analysis published in the Journal of Management in 2023 examined the relationship between work effort and job performance across 62 studies involving 12,219 participants. The researchers found an overall corrected correlation of approximately 0.31 between effort and job performance.
The relationship was stronger when researchers measured multiple aspects of effort, including intensity and persistence. Those measures had a corrected correlation of approximately 0.37 with job performance.
The findings suggest that sustained effort is associated with better performance, particularly when it involves more than simply trying hard in a single moment. Persistence and the way effort is applied also matter.
Still, correlation does not prove that effort alone causes success. Skills, resources, working conditions and opportunities can all affect the outcome. The study supports a connection between effort and performance, not a guarantee that the hardest-working person will always win.
Cuban’s advice focuses on what people can control
Cuban’s message is ultimately less about hustle for hustle’s sake and more about personal responsibility.
No employee can control every decision made by a boss. No entrepreneur can dictate how customers will respond to a product. And no amount of preparation can eliminate every risk.
But people can control how thoroughly they approach a task, how persistently they work through a problem and whether they make an honest attempt to find a solution.
That approach won’t guarantee success. It can, however, improve the odds of producing better work and recognizing opportunities others overlook.
In Cuban’s view, the advantage comes from doing what many people aren’t willing to do. Not just starting the work, but seeing it through.
