This documentary shows some of Tibet’s lineage Yogis & sacred sites, while outlining some of the process & preparation which goes into a 3 year 3 month 3 day retreat.
Included is a video teaching by Geshe Kelsang Gyatso 2009, a short film called "The Illustrated story of Dorje Shugden", a Dorje Shugden thangkha, and some recent info shared by H.H. Buddha Maitreya.
Tsong Khapa's Lam Rim Chen Mo - Treatise on the Graduated Path to Enlightenment, said to contain the essence of all 84,000 teachings of Buddha Sakyamuni.