16 of the biggest leaders in Silicon Valley reveal the one thing they would tell their teenage selves

The question was posed by a Quora user, and Sandberg took the time to lay out a detailed response, in the form of three pieces of advice instead of the one.

1. Find work you love. When you believe in what you are doing, you can combine passion with contribution – and that is a true gift. Keep trying and you will find what you love to do… and once you do, you will crush it.
2. Believe you can do anything. This is important for everyone and especially for women. Don’t let anyone tell you can’t have both a meaningful professional career and a fulfilling personal life. When you hear someone say you can't do something, know that you can and start figuring out how. Ask yourself, “What would I do if I weren’t afraid?”
3. There is no straight path to where you are going. If you try to draw that line you will not just get it wrong, but you will miss big opportunities. As Pattie Sellers of Fortune Magazine says, careers are not ladders but jungle gyms. You don't have to have it all figured out. I recommend adopting two concurrent goals.

That was Dorsey's simple response when Y Combinator interviewed Jack Dorsey in 2016.

"When I was young I didn’t understand the value of exercise or health and how that affected my intellect," he added. "I think it was useful for me to go to all the extremes to find the balance I have now, but I wish I focused more on being healthier in the past. A healthier lifestyle ultimately makes me more creative and allows me to think more cohesively."

Zuckerberg answered the question during a 2015 user Q&A that the company livestreamed.

He told conservative student magazine Intercollegiate Review this in 2015 during an interview, according to Business Insider.

Cook has said this multiple times — during a commencement speech for Auburn, for example — but most recently said it in March in response to a question from the audience after an in-person interview.

Here is his whole response:

"Usually, people are deciding between going to college (and usually working on side projects while they do so), joining a company, or starting their own startup. The secret is that any of these can be right answer, and you should make your decision based on the specific circumstances of each option.

"The critical point is that you want to do the thing that is most likely to get you on a path to do something great. No matter what you choose, build stuff and be around smart people. 'Stuff' can be a lot of different things — open source projects outside of class, a startup, a new sales process at a company you work at — but, obviously, sitting around talking with your friends about how you guys really should build a website together does not count."

The entrepreneur responded to an email from show host Shivad Singh, who was compiling answers from "the world's most successful people."

"It's very easy – in life or in work – to overreact, to think that problems indicate that you are incapable, or that the project you've undertaken is doomed to failure," he added.

"But almost any undertaking involves a steady stream of unforeseen difficulties and mistakes. The key is to not freak out; just calmly deal with each problem, one at a time, until you achieve your desired outcome, or feel inspired to choose a new one. With experience, you will learn to see the bigger picture, less fazed by life's ups and downs."

Source: Head Start

Source: Head Start

This came from an excerpt Branson wrote entitled "My letter to my younger dyslexic self," in which the letter begins "Dear Ricky."

According to this response to Forbes, he was referring to anthropology class he took in college to fulfill a required credit. He said it was boring at the time, but it taught him a lot about making companies that are based on and driven by helping people.

Wales told Fast Company: "I think one of the things that most 21-year-old people should do is to recognize now that you can make life choices which control your expenses, and that controlling your expenses is one of the most crucial steps toward the kind of financial independence that you need in order to follow your dreams in the future."

His favorite rule of thumb for this piece of advice? Never go into debt to finance anything luxurious. Only do it for necessary investments like education.

"And most careers worth having involve a fair amount of determination, grit, and just general 'try try again'-ing," she added.

Mullenweg told Product Hunt: "Something I didn’t appreciate until recently is that there any many productive decades ahead with which to build the things that I feel need to exist in the world. One of the best things I did then was avoid any press or capitalization on my age (to the extent I could) because youth is an ephemeral asset and just a novelty in business."

“For most people," he continued in his response to Forbes, "the idea of chasing a personal passion or being entrepreneurial is simply something they don’t think of themselves doing. We’re so programmed to walk well-trodden paths. But, we live life only once. So, rather than avoiding the risk of trying, avoid the risk of not trying. Nothing is more haunting than thinking, ‘I wish I had…’.”

Ljung said he often referenced a quote that T.S. Eliot had reportedly used "If I had more time, I would have written a shorter letter" when he made decisions around leadership, design, and product.