Advice from 14 successful CEOs and entrepreneurs

Regardless of how we define it, success can feel like a fleeting and often elusive target.

It takes confidence, passion, and drive to reach a level of success and then do what's necessary to sustain it.

We've collected wisdom from 14 prominent CEOs and entrepreneurs who have seen drastic ups and downs throughout their careers.

Their advice is as appropriate for someone just starting out as for an industry veteran.

Steve Jobs, Apple cofounder and late CEO

Steve Wozniak, Apple co-founder

Jack Ma, Alibaba Group founder and chairman

Marissa Mayer, Yahoo CEO

Mark Cuban, serial entrepreneur and 'Shark Tank' investor

Barbara Corcoran, Corcoran Group co-founder and 'Shark Tank' investor

Warren Buffett, Berkshire Hathaway CEO

Jack Dorsey, Twitter co-founder and CEO/Square founder and CEO

Richard Branson, Virgin Group founder and chairman

Mark Zuckerberg, Facebook co-founder and CEO

Aaron Levie, Box cofounder and CEO

Lori Greiner, serial entrepreneur and 'Shark Tank' investor

Marc Andreessen, serial entrepreneur and Andreessen Horowitz partner

Michael Dell, founder and CEO of Dell Technologies