Golf
Want a better way to practice? This is how Tiger Woods found 'eureka' moments – GOLF.com

At the height of his career, Tiger Woods would immerse himself in one aspect of golf for days at a time. He could just putt for two days straight.
At the height of his career, Tiger Woods would immerse himself in one aspect of golf for days at a time. He could just putt for two days straight.
Read more at the source: golf.com