"What do you know now that you wish you had known at age 20?"

That's the question Benjamin Ling (who you should definitely follow on Twitter), a partner at venture capital firm Khosla Venturesposed to to his Twitter followers two weeks ago.

Thanks to the reputation he garnered from his senior roles at Google, YouTube, and Facebook, Ling was able to get answers from a range of big names in Silicon Valley, from the CEO of Reddit to one of the founders of Sun Microsystems.

Many of the responses focus on the importance of building relationships, the importance of perseverance, and advice for those looking to start their own companies.

Ben turned to Twitter to ask what people wish they had known at age 20. After getting over 200 responses, he rounded up the top 20.

Image credit: Ben Ling

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Hunter Walk, Director of Product Management at YouTube

Image credit: Ben Ling

Michael Yang, Head of Biz Dev at Pinterest

Image credit: Ben Ling

Jason Goldberg, CEO of Fab

Image credit: Ben Ling

Logan Green, CEO of Lyft

Image credit: Ben Ling

Brian Caldwell, Partnerships for Evernote

Image credit: Ben Ling

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Walter Kortschak, Senior Advisor at Summit Partners

Image credit: Ben Ling

Om Malik, Founder of GigaOM

Image credit: Ben Ling

Ben Smith, Founder of MerchantCircle

Image credit: Ben Ling

Chris Sacca, Founder of Lowercase Capital

Image credit: Ben Ling

Eric Rosser Eldon, Co-editor at TechCrunch

Image credit: Ben Ling

Naval Ravikant, Founder and CEO of AngelList

Image credit: Ben Ling

Mitch Colleran, Partnerships at Eventbrite

Image credit: Ben Ling

Ben Ling, Partner at Khosla Ventures

Image credit: Ben Ling

Keith Rabois, Partner at Khosla Ventures

Image credit: Ben Ling

Yishan Wong, CEO of Reddit

Image credit: Ben Ling

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Tom Katis, Founder and CEO of Voxer

Image credit: Ben Ling

Sam Altman, Partner at Y Combinator

Image credit: Ben Ling

Matt Douglass, Co-founder of Practice Fusion

Image credit: Ben Ling

Aaron Levie, Founder and CEO at Box

Image credit: Ben Ling

Vinod Khosla, Founder of Sun Microsystems and Khosla Ventures

Image credit: Ben Ling

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