At 82, self-made billionaire Jack Cowin has a number of simple truths about life and business to share.

"I didn't come from (money) ... I'm kind of self-made. I use that terminology and I'm proud of it," Cowin said. CNBC Do it.

He made a fortune from selling fast food. In 1969, he bought his first KFC outlet in Australia, which eventually grew into a 55-store franchise. He then sold it for more than $71 million in 2013, according to a company representative.

Cowin is also the founder and chairman of Competitive Foods Australia, the company that operates Burger King as "Hungry Jack's" in Australia — a chain of more than 400 restaurants today. He is also the largest shareholder of Domino's Pizza in Australia, and supports a plant-based meat substitute company called v2food.

His business is worth more than $3 billion and brings in more than $300 million a year, Cowin said. CNBC Do it.

Before starting his fast food empire, Cowin played football in university and even had a "brief flirtation" with playing professionally. "Business is a team sport," he said.

"Don't be a dentist ... when you're not drilling teeth, you're not making money," Cowin told CNBC Make It. "If you want to do something (that) is bigger and has more purpose, you have to become a team player and... to become a team player, you have to interact with people," he said.

"Be aware of the fact that you can't do it alone," said Cowin.

Business isn't just about meeting your own needs — it's also about meeting the needs of others, whether they're employees, customers, investors or business partners. He said being a "people person" and having an innate curiosity and desire to learn were essential to his success.

When asked to give advice to young people who may be feeling lost in life, Cowin said, "The short answer is - if you're lost, be active with something."

"I see people who get fired or something goes wrong in their life. They sit on the sidelines and lose confidence ... you have to be in the game to succeed," he said.

After spending some time reflecting, it's important not to get stuck in a cycle of moping: "You've got to get back into the mainstream of life by doing things, interacting with people," he said. "Think, don't think about it."

Today, Cowin says, he has created around 150,000 jobs globally between his Domino's Pizza business — which consists of 4,000 stores across 12 countries — and his Hungry Jack's business.

At 82, he says, he has no plans to get out of the business.

"If there was a summary of my life, I looked at it as an adventure, rather than slogging out day after day," he said. "It was an adventure (of) doing new things, new businesses, new this, new that, and it was fun."

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