When Warren Buffett started his investing career, he would read 600, 750, or 1,000 pages a day.
Even now, he still spends about 80% of his day reading.
"Look, my job is essentially just corralling more and more and more facts and information, and occasionally seeing whether that leads to some action," he once said in an interview.
"We don't read other people's opinions," he said. "We want to get the facts, and then think."