How to Find the 20% That's Giving You 80% of Your Difficulty

"I have a daily checklist. If there have to do this for the day, I set them to that one," he says. "When you start looking at all the things that could be causing the problems that you're having ... You'll find that, okay, the problem has happened 60 times in the last month, then 50 of them were because of this."