Ultralearning: Master Hard Skills, Outsmart the Competition, and Accelerate Your Career
by Scott Young, 2019

Anecdotal, but somewhat helpful. Wish he had more examples/data to draw from. The goal is to teach you how to learn a lot of hard things in a short amount of time.

Principle 1 – Metalearning: First Draw a Map
Principle 2 – Focus: Sharpen Your Knife
Principle 3 – Directness: Go Straight Ahead
Principle 4 – Drill: Attack Your Weakest Point
Principle 5 – Retrieval: Test to Learn
Principle 6 – Feedback: Don’t Dodge the Punches
Principle 7 – Retention: Don’t Fill a Leaky Bucket
Principle 8 – Intuition: Dig Deep Before Building Up
Principle 9 – Experimentation: Explore Outside Your Comfort Zone