I came across “The Harada Method” used by baseball star Shohei Ohtani via this tweet

The Harada Method was created by Takashi Harada, a Japanese junior high track coach. He took a team ranked last out of 380 schools and, using his system, turned them into the #1 team in the region within 3 years. They held that top spot for the next 6 years.
You start by placing your main goal in the center of an 8x8 grid.
Next, identify 8 critical supporting pillars needed to achieve that goal. These surround the main goal.
then break down each of those 8 pillars into 8 smaller, actionable tasks or daily routines.
This fills out the entire 64-cell grid, turning a massive dream into a concrete, daily action plan.
The method goes far deeper than just technical skills. It forces you to analyze your weaknesses and build confidence. It also has a highlight on service to others, emphasizing that humility and contributing to your community are essential for personal success. The key to the system is daily execution and accountability. Once the 64-cell chart is complete, you turn the tasks and habits into a daily diary and a “Routine Check Sheet.” It’s designed to transform abstract intentions into a measurable, daily practice.