Tsongkhapa Guru Yoga: Guru yoga and guru devotion are one of the central practice in the Vajrayana (Tantric) tradition.  In Tibetan Buddhism there are four lineages: Nyingma, Kagyu, Sakya, and Gelug.  In the Gelug traditions, one of the most important practices is Je Tsongkhapa’s Guru yoga, Ganden Laghyama, as we as Lam Rim.  This Guru Yoga contains all the principle teachings of the Buddha.