Phillip Chaffee

“You can adapt this strategy for nearly any purpose. Say you want to feel happier in general. Find something that makes you truly happy—like petting your dog or taking a bubble bath—and then create a short routine that you perform every time before you do the thing you love. Maybe you take three deep breaths and smile. Three deep breaths. Smile. Pet the dog. Repeat. Eventually, you’ll begin to associate this breathe-and-smile routine with being in a good mood. It becomes a cue that means feeling happy. Once established, you can break it out anytime you need to change your emotional state. Stressed at work? Take three deep breaths and smile. Sad about life? Three deep breaths and smile. Once a habit has been built, the cue can prompt a craving, even if it has little to do with the original situation.”
― James Clear, Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones