The 2 best Personal Development books

Atomic Habits is the power of becoming 1% better each day, compounding improvements to become a better version of yourself. Habit formation works in four steps - cues, cravings, responses and rewards. Leverage these to establish and maintain good habits, and make the bad ones hard to pursue.

The Compound Effect is the idea that small changes compound into huge results over time. There is no need for radical changes - instead make tiny changes each day and see drastic change. Routines can build momentum and courage to reach beyond your limits.