Before you walk through a door, pause, even for a second, and take one breath. Be aware of the differences you might feel in each new space you enter.

Part of this practice is to pay careful attention to how you close the door when entering a new space. We often move immediately into a new space without finishing up with the old one, forgetting to close the door or letting it slam shut.

Jan Chozen Bays in How to Train a Wild Elephant and Other Adventures in Mindfulness