[jallbrit]

> A requirement for changing habits is changing the physical world.

James Clear talks about this in Atomic Habits [0][1], explaining that to break a bad habit, you must invert the first law of good habits ("Make it Obvious") so that the bad habit is "invisible". To do this, as you say, you must change your environment: "Reduce exposure. Remove the cues of your bad habits from your environment."

[0] This Atomic Habits summary was posted on HN recently: https://www.chrisbehan.ca/posts/atomic-habits [1] https://s3.amazonaws.com/jamesclear/Atomic+Habits/Habits+Che...