Rick Rubin's goal is to get people to do their best work. In that sense, he is a leader. And as a life-long practitioner of meditation, he has figured out how to affect others the way meditation affects him.
Here's the thing: Meditation is for everyone, and it's different for everyone. There is no right or wrong way of doing it, and meditation can help you increase your focus, reduce stress, and prevent common health ailments.