"Shark Tank"'s Kevin O'Leary advised budding entrepreneurs to "work for 24 months in a sector you love" before launching a business.

Carlin is a contributor for TIME. As the host of The Diary of a CEO, British entrepreneur, investor, and author Steven Bartlett has emerged as a prominent voice in business and personal development.

Perseverance helps you keep from giving up; a strategic mindset helps you refine and adapt your approach as you work to achieve your goal. The researchers found that the more often participants asked ...