Lojong is the Tibetan Buddhist practice that involves working with short phrases (called "slogans") as a way of generating bodhichitta, the heart and mind of enlightened compassion. Though the practice is more than a millennium old, it has become popular in the West only in the last twenty years or so--and it has become very popular indeed, because it's a practice that one can fit very well into an ordinary life, and because it works. Through the influence of Pema Chodron, who was one of the first American Buddhist teachers to teach it extensively, the practice has moved out of its Buddhist context to affect the lives of non-Buddhists too.