Updated

When it comes to business, the Shark Tank crew doesn't play around. From tech billionaire Mark Cuban to free-wheeling real-estate mogul Barbara Corcoran, all the investors on the popular ABC TV show are no-nonsense when it comes to evaluating the startups that come to them seeking money and mentorship.

That's why so many people love the show -- to the tune of 6.9 million weekly viewers. Not too shabby for a show that's been on air for six seasons.

Entrepreneur

Shark Tank

1. Get your hustle on.

markcubancompanies.com

Read more: Mark Cuban: Outwork and Outlearn Your Competition

2. Want to be a winner?

Barbara Corcoran | Facebook

Read more: Shark Tank's Barbara Corcoran: Real Winners Say 'Hit Me Again'

3. What are you waiting for? Get started already.

Kevin O'Leary | Facebook

Read more: Exclusive Q&A with Shark Tank's Investors

4. Don't try to play your investors.

daymondjohn.com

Read more: Shark Tank Star Daymond John Says Never Make This Common Mistake When Pitching Investors

5. It's all about the freedom.

www.lorigreiner.com

Read more: Shark Tank Star Lori Greiner's 4 Money Rules for New Entrepreneurs

6. If you can't stand the heat

robertherjavec.com

Read more: Exclusive Q&A with Shark Tank's Investors

7. When making a first impression, be yourself and no one else.

Daymond John | Twitter

Read more: The Stars of Shark Tank on How to Dress for Success

8. You gotta get your hands dirty.

Lori Greiner | Facebook

Read more: Shark Tank Star Lori Greiner's 4 Money Rules for New Entrepreneurs

9. Encourage your kids to achieve their own greatness.

Pummax | Wikipedia

Read more: Shark Tank's 'Mr. Wonderful' on Teaching Kids About Money: 'Put Their Noses In It, Like You're Training a Puppy'

10. Fail. Learn. Grow.

Mark Cuban | Facebook

Read more: Billionaire Entrepreneur Mark Cuban: 'Failure is Part of the Success Equation'