Celebrities from Brad Pitt and Selena Gomez to Jeff Bezos have worn this millennial CEO's eyewear brand. Here are Garrett Leight's 5 key tips for aspiring entrepreneurs.

When speaking about how his brand uses social media for marketing, Leight and his brand's chief communications officer Jamie Katz emphasized that they rely on authenticity in order to connect with customers, future buyers, and most importantly, brand ambassadors.

"It's more about an organic alignment. If they feel like they are an extension of what we've tried to create as the Garrett Leight lifestyle, then we feel like they're probably in a community of people that would also appreciate the Garrett Leight lifestyle and the brand," Katz said.

To ease his stress, Leight makes sure he involves himself in activities that can take his mind far away from the world of business and entrepreneurship. He plays golf, softball, and regularly gets massages and acupuncture, and he recommends others invest in health and wellness activities that can ease the mind.

"I've felt overwhelmed in my head," Leight told Business Insider. "For me, stress comes ... in my neck and my back. Some people, it's in their stomach, it's all through their body ... I think even if you feel great at 25, it eventually will catch up to you. So I think introducing these [wellness] forms are important."

Katz doubled down on what Leight had to say.

"People think, 'Oh no, I can't take a break. I have to stay focused. I have to do this, and work all these hours,'" Katz said. "It's like, you're gonna end up not achieving what you could achieve if you just take the time to take care of yourself, do a digital detox, shut down for a little while to take your mind off of what you're doing and then come back feeling refreshed, feeling focused. You could get to the answer that you're looking for, the solution or whatever it is, so much quicker."

"You have to pay for everything you buy [but] you're not going to sell everything you buy," Leight said. "Some people are so lucky and, especially today, in that they could just have, it seems, mostly with celebrities and influencers, that they just make something, and they make 50 units and it sells out, and it's all about scarcity. But that's super rare and I would just be really conscious [of how much inventory you have]."

One of the most important things Leight has learned throughout his career is to not take anything for granted.

"When you're growing really fast, you kind of feel like you're on top of the world and [you] could lose sight of some things," he said. "At least as an entrepreneur, you're always one mistake away from losing everything, more or less. So you just have to be aware of your business. And, especially as a creative leader, trying to have a grounded mindset and an understanding of the financial and operational side [can help you] be operationally excellent and not lose what you've created."