The amount of break in a putt depends on the speed you hit it.
This drill will give you the visual of the break, and let you feel the correct speed.
1. Find a breaking putt to match your skill - the longer the putt, the more skill is required
2. Place tees to the high side of the hole to reflect the amount of break required
Less speed- more break. More speed-less break.
3. Focus on the different targets and the required speed
4. Finish your session with the "around the world drill" and focus on the speed you want to hit the putt, and the correct target.