How to Change - Bagaimana Berubah Sekali untuk Selamanya

The book combines psychology and real-world applications — I'm curious what led to this focus and how the author decided which studies to include.

Some suggestions felt so actionable that I started trying them right away. Has anyone experienced notable changes after applying these ideas?

The personal anecdotes add a lot of flavor, but I wonder what guided the selection process—were they based on research, personal experience, or both?