It was reported that last month Oprah Winfrey made anywhere from $42 to 60 million in one day.

It doesn't matter if you work in finance, technology, design or any other industry, we can all learn something from how these luminaries approach professional obstacles, and the skills they hone to reach the top of their respective fields.

Success in entrepreneurship is the result of a great many factors, but these dirty secrets are seldom talked about.