The primary resources for working at dharma
are a good guru, the proper practice of dharma
with a workable mind, and suitable conditions for dharma
practice - food, clothing, and so on. If these three are all available to you, take joy in that and pray that they be available to others, too. If they are not all available, meditate on compassion for others and take on yourself the deficiencies that all sentient beings experience in these primary resources. Pray that you and all others may have them.
From The Great Path of Awakening : An Easily Accessible Introduction for Ordinary People by Jamgon Kongtrul, translated by Ken McLeod. Copyright 1993 by Ken McLeod.
Published by arrangement with Shambhala Publications, Inc., Boston.
This site provides an on-line database of commentaries on the Tibetan Buddhist meditation practices of lojong (Mind Training) and tonglen.