As a result of a recent crack climbing binge, I had this mini-epiphany:
All crack climbing is just "Slide & Wedge."
Your hands slide and wedge. Your feet slide and wedge. Your body slides and wedges.
Most crack climbing trouble is a failure to slide or wedge. Identifying and treating that single biggest weakness has the potential to up anyone's splitter game.
Sprinkle in high pain tolerance, you are ready for the 'Creek.