Got this from over at science of skill, an amazing insight in its own right about the mental aspect/approach/methodology of training:
It highlights the mental approach of Draculino, Andre Galvao, Joe Lauzon, Fredson Paixao, and Cai Terra.
Again, the common threat is that they believe in what science of skill articulates as "deliberate practice".
Meaning, they don't just "show up and roll" and get better over time.
They seek to mentally pinpoint a position, submission, transition, takedown, or series which needs improvement, refinement, addresses another competitor, or a part of their overall game.