These are my slides from "Growing The 'T': Learning for Breadth and Depth" at Devops Days Nashville. Resources are at:
Peak: Secrets from the new Science of Expertise: https://www.amazon.com/Peak-Secrets-New-Science-Expertise-ebook/dp/B011H56MKS
Grit: The Power of Passion and Perseverance: https://www.amazon.com/Grit-Passion-Perseverance-Angela-Duckworth-ebook/dp/B010MH9V3W/ref=sr_1_1?crid=333BG8KTAEMD7
Mindset: The New Psychology of Success: https://www.amazon.com/Mindset-Psychology-Carol-S-Dweck-ebook/dp/B000FCKPHG/ref=sr_1_1?crid=REYYCUG7TDCR
A Five Stage Model of Directed Skill Acquisition: https://apps.dtic.mil/dtic/tr/fulltext/u2/a084551.pdf
Ebbinghuas Forgetting Curve: https://www.psychestudy.com/cognitive/memory/ebbinghaus-forgetting-curve