Buddhist teachings.
I’m not a Buddhist but a lot of the ideas in Buddhism have helped me tame my own brain.
The Four Noble Truths
The path to inner calmness was outlined by the Buddha in the Four Noble Truths. This article from Lion’s Roar does a nice job of sharing it in a clear way.
The Five Remembrances
We all suffer from deep human anxieties, like the fear of getting ill and the fear of dying. This meditation helps us deal with these fears. Here’s a link to a great article about Buddhism and the Five Remembrances.