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

"It's not about money or connections -- it's the willingness to outwork and outlearn everyone when it comes to your business. And if it fails, you learn from what happened and do a better job next time."
-- Mark Cuban

Read more: Mark Cuban: Outwork and Outlearn Your Competition

2. Want to be a winner?

Barbara Corcoran | Facebook

“The difference between the real winners is how long they take to feel sorry for themselves. My winners feel it… but they come back up and say ‘hit me again.’”
-- Barbara Corcoran

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

"Nobody has a monopoly on good ideas."
-- Kevin O’Leary

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

4. Don't try to play your investors.

daymondjohn.com

“If you can’t come clean and tell investors how and why you failed, that raises a red flag. They need to see that you learned from it and came back stronger.”
-- Daymond John

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

"I roll out of bed in the morning, whenever I want, and I work right away because, to me, that’s the life. That’s freedom. The whole point for me is that I love the freedom of being an entrepreneur that I do what I want to do when I want to do it.”
-- Lori Greiner

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

6. If you can't stand the heat

robertherjavec.com

“Tough times never last; tough people always do."
-- Robert Herjavec

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

"Always dress to what is accurate to who and what you are.”
-- Daymond John

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

8. You gotta get your hands dirty.

Lori Greiner | Facebook

"I learned that nobody’s better than you to get your business off the ground. The experience you get is priceless.”
-- Lori Greiner

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

“I’m not planning on giving my kids any of my wealth. They know when their education is over, I’m pushing them out of the nest. The bird you see dead under the nest is the one who didn’t think about the future."
-- Kevin O’Leary

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

“I wouldn’t be where I am now if I didn’t fail... a lot. The good, the bad, it’s all part of the success equation."
-- Mark Cuban

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