Get a hobby! No, really.

From the Aesthetics of Joy:

Creative hobbies provide experiences of flow and play that give us the deep pleasure of being in the moment. One study of more than 400 people showed that having a creative hobby increased people's sense of being relaxed and in control, perhaps because the experience of mastering complex challenges in a low-stakes context helps bolster our feelings of self-efficacy. Having creative hobbies also made these people more collaborative and creative in their work. Creative hobbies significantly reduce stress (I love this story of how painting saved Winston Churchill from a nervous breakdown) and increase feelings of joy and flourishing. It doesn't need to be a huge time investment. Even just two hours a week seems to be enough to cause these effects.