Every environment teaches behavior through what it makes easy.

Behavior follows the path of least resistance in whatever space you are in. If the fruit is visible and the shoes are by the door, you eat fruit and go outside; if the phone is on the nightstand, you look at it. None of this is willpower. Environments quietly instruct people, and most of what feels like character is really arrangement.

Pick one behavior you want more of and make it three steps easier. Then pick one you want less of and add friction. The change usually outperforms resolve.