I have found Mindfulness Meditation to be the most helpful means of nurturing my own ability to be grounded and compassionate.  I tend to lean toward Buddhist iterations – but I believe that mindfulness practice is incredibly helpful outside of any ideology.  Below are some of the resources I’ve relied on.  They are all available as audio books through Audible. I will share others as they come to me.

Living Without Stress Or Fear, by Thich Naht Hanh
Visit the Plum Village website for teachings and other resources

The Roots of Buddhist Psychology, by Jack Kornfield
Find podcasts of teachings and meditations by Jack Kornfield

The Science of Mindfulness (The Great Courses), by Ronald Siegel

Awakening Compassion, by Pema Chodron

Adventures in Mindfulness, by Jon Kabat-Zinn
See also videos of Jon Kabat-Zinn speaking or teaching

The Wisdom of Compassion, by His Dalai Lama