Mark Cuban spends ‘4 or 5 hours a day’ reading — here’s what’s on his list

As soon as billionaire entrepreneur Mark Cuban wakes up in the morning, he starts learning. For him, that means spending the entire first half of his day reading. He says its been key to his success.

“I read everything I can. I don’t care what the source is,” Cuban tells CNBC Make It. In total, he says his reading routine takes up “four to five hours a day.”

Here’s where Cuban says he is investing his time.