What is choice architecture personal development?

Example: A product designer spent six months failing to write consistently. She tried morning routines, accountability partners, word-count targets, and three different productivity apps. Nothing stuck past two weeks. Then she applied the full choice architecture toolkit: she set her writing application as the default window on her laptop (defaults), removed social media from her phone before bed (temptation removal), placed her notebook and pen on the left side of her keyboard every evening (visual cues), told her partner she would be unavailable from 6 to 7 AM (social environment), blocked her browser during writing hours (digital architecture), and committed to reviewing her setup every Sunday (iterative design). Within a month she had written more than in the entire previous year. She did not become more disciplined. She became a better architect.

This concept is part of Choice Architecture in the How to Think curriculum.