Mark Cuban is worth over $4 billion -- and he says the best advice he's ever gotten was these 2 sentences

Mike Windle / Getty Images Mark Cuban is a successful entrepreneur, investor, owner of the Dallas Mavericks, and worth an estimated $4.3 billion. According to Cuban, the best advice he's ever received was hearing from his dad, "Today is the youngest you will ever be. Live like it." Live like today is the youngest you'll ever be by setting a goal, creating a process that supports it, tracking your progress, fixing what doesn't work, and repeating what does. Visit Business Insider's homepage for m...