While Bill Gates is no longer at the helm of Microsoft, the entrepreneur turned billionaire philanthropist still has a few things on his to-do list: , researching treatments and .
Although tackling the world's most complex problems must seem overwhelming, Gates writes in an article for Time that he's recently begun to take more time for himself.
"When I was in my 20s and early 30s, my whole life was focused on work," he writes. "These days, I'm better at balancing the work that I love to do with my foundation and taking time off to spend with family and friends."
Here are his top ways to unwind.
Gates plays the card game Bridge and the board game Settlers of Catan.
"My parents first taught me bridge, but I really started to enjoy it after playing with Warren Buffett," Gates writes in Time of his billionaire bestie. "It takes a mix of strategy and teamwork to do well. We always find time to play a few games when we're together."
Buffett himself spends playing bridge, and tells the Washington Post, "It's the best exercise there is for the brain." Buffett even sees lessons in business mirrored in bridge, telling CBS News, "You have to look at all the facts. You have to draw inferences from what you've seen, what you've heard. You have to discard improper theories about what the hand had as more evidence comes in sometimes."
As for Settlers of Catan, "This civilization-building board game is a favorite in my family," Gates writes. "Melinda, our kids, and I have spent many hours sitting around the table trading resources, building roads, and strategizing to be the first to reach 10 victory points."
Gates and Buffett may be on to something: 2014 research by the University of Wisconsin-Madison found that embracing cognitive activities like playing card games is beneficial to brain health, according to The New York Times.
A trip to the tennis court is a way Gates relaxes. "I have played tennis my whole life," he writes.
Fellow billionaire Richard Branson is also a tennis fanatic, and says lessons he's learned on the court also translate to success in business.
"One key lesson I've learned, which applies far beyond the court, is to treat each point separately," Branson writes in a post on LinkedIn. "Forget the last mistake and move onto the next challenge. Tennis, like business, moves so quickly that if you dwell on the past for even a few minutes, an opportunity will have passed and the moment will be lost."
Gates and Branson are in good company: other business leaders like Mark Zuckerberg, Oprah Winfrey and Mark Cuban prioritize staying active.
Gates is well known to be a voracious reader.
"On average, I try to read a book a week, and I always bring a whole tote bag of them on vacation," Gates writes for Time.
While Gates may find it relaxing, he's also enjoying the science backed benefits of reading. For example, research published by Stanford found that close reading of a novel increased blood flow to underused areas of the brain.
Dedicating time to reading can also be critical for success in your career, according to Warren Buffett and Mark Cuban. While "most people won't put in the time to get a knowledge advantage," Cuban writes on his blog, he tries to spend three hours a day reading to stay sharp.
For Buffett, that means spending "five or six hours a day reading," he says in HBO's documentary, "Becoming Warren Buffett."
Lastly, Gates makes time to travel. One trip in particular had a life changing impact, he tells Time.
"In 1993, Melinda and I visited Tanzania, Kenya, and Zaire (now the Democratic Republic of Congo)," he writes. "That trip changed our lives and inspired us to start our foundation and get involved in philanthropy sooner than we planned."
Traveling abroad can have numerous benefits, like increasing your creativity and relieving stress.
Like this story? Like CNBC Make It on Facebook.