To cultivate a good heart, one should stop the following eight activities, according to Khyentse Yangsi Rinpoche.
Crucial Instructions
The late Dilgo Khyentse Rinpoche, a great 20th century Buddhist teacher, offers four sets of pithy teachings on bringing the absolute nature into our path.
Never Born, Never Ceasing

A teaching on the nature of mind by the late Dilgo Khyentse Rinpoche on The Hundred Verses of Advice by Padampa Sangye.