
Once upon a time, Mark Cuban was not rich. It may be hard for people,  especially sports fans, to imagine, but it's true. Once upon a time, he  was a young Pittsburgh native just trying to make it in the world.
There are millions of Americans today trying to make it like Cuban,  whose net worth, according to Forbes, is $2.5 billion. The business  mogul and entrepreneur knows there are others who have the potential to  hit it big in business. And he has some advice for them.
Tip No. 1: You don't know everything
 In the egotistical world of business, it is easy to get overconfident.  Cuban himself was fired from an early job at Your Business Software in  Dallas when he went to close a deal at the same time he should have been  opening the door.
"When I first got started, I thought I knew everything or that if I  didn't know it, I could figure it out in a heartbeat," Cuban told  ThePostGame. "I worked hard to learn the things I didn't know, but over  the years, I've come to the realization, there are some things I just  don't know and that's OK."
Tip No. 2: If you don't know something, seek help
 Again, Cuban warns others of being overconfident. Many people think they  can do it all, but human error prevents anyone from being perfect.  Prospective businessmen and entrepreneurs must expect holes in their  knowledge. They must learn to trust others.
"The things I don't know, it's a lot better if I just recognize and  accept it and go find someone who can fill that skillset, fulfill that  knowledge and complement what I can do," Cuban said. "When I first got  started, I tried to do it all."
Tip No. 3: Everyone has ideas
 Congratulations, people of the world. Everyone on the planet has come up  with some idea they think would make life easier. It's natural.