As ZinePak co-founder Kim Kaupe explains, the most successful entrepreneurs tend to be supported by great mentors. Until you find one or two to work with, however, we've got you covered.

Our most-watched videos in 2015 feature some of the biggest names in business describing the secrets they've learned about starting a winning company. From life coach Tony Robbins's story about a UPS worker who was able to retire with $70 million in savings to Shark Tank host Daymond John's advice on failure, these videos provide tips and inspiration that all entrepreneurs can benefit from this year and in 2016.

The Shark Tank star and owner of the Dallas Mavericks says he applauds founders who are ready to quit their job, live on nothing, and put every penny they have into their business. At that point, Cuban explains in this "Playbook" video, "you know your industry better than anybody, so you're not really taking a risk." If you don't have that drive and confidence, "I've got nothing for you," he adds.

Marcus Lemonis, the CEO of Camping World and star of the hit CNBC series The Profit, sits down with Casey Elsass, a honey entrepreneur who earned $170,000 in his first year selling Bees Knees Spicy Honey. But Lemonis cautions that Elsass may be selling his product short. "I don't think you're ready for retail until you truly know what your fully loaded costs are," he explains in this "Ask Marcus Lemonis" clip.

"You don't earn your way to a fortune, you invest your way," says life coach Tony Robbins. In this "Idea Lab" video with Inc. editor in chief Eric Schurenberg, Robbins describes how a UPS worker who made $14,000 a year retired with $70 million in savings by regularly investing 20 percent of his income. 

After almost a decade of research and $100 million in costs, Icon Aircraft, a consumer plane manufacturer, has sold its first A5 aircraft. The company is now ramping up production in an effort to fill 1,500 pre-orders over the next three years. Inc. reporter Will Yakowicz took a demo flight of the amphibious sports aircraft along the Hudson River in New York City.

It's important to have a mentor who knows you personally and is also familiar with your business. But it's also crucial to have a coach who doesn't know you or your business. They'll be honest with you and they can give you an outsider's perspective, says ZinePak co-founder Kim Kaupe in this "Playbook" video.

The Shark Tank host and founder of FUBU has some surprising advice on what he looks for in an entrepreneur. In this "Playbook" clip, he mentions the first trait on his checklist: a record of previous failure. 

Serial investor Russell Simmons isn't simply looking for a return on his money. As a longtime vegan, for instance, he says he won't sell or invest in any animal product. "I have to love what I do, I have to believe what I do," says Simmons.

Before she launched her first company, Stacey Ferreira reached out to Richard Branson on Twitter. The billionaire founder of Virgin Group didn't just respond--he decided to back her first venture. "It's interesting that today those barriers to meeting high-profile people are broken down," Ferreira explains in this "Playbook" video. "It's totally possible to reach out to people you look up to."

The author of Fearless Genius describes in this "Playbook" video what it was like working with Apple co-founder Steve Jobs. "He was willing to go off that cliff: He spent $100 million of his own money, his whole savings pretty much, on Pixar and NeXT, but he kept going."

A key task of running a digital media company is keeping one eye focused at all times on how the digital landscape is changing. That's why the founder of the Cheezburger Network embraces the newest devices and gadgets from companies like Apple, Google, and Amazon. "You start to realize where these companies are headed and what is happening to people's access to technology," he explains in this "Playbook" video.

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