Lifelogging digitally captures every moment of our daily lives. Moore's Law and cloud computing offer us unlimited data processing. Leveraging the connection between spatial location and memory retrieval (method of loci), MENTAL GPS uses geography as an organizing principle for mental memory mapping. Using VR tools, today I literally walked a mile in my grandpa's shoes. With access to all human knowledge, what will we choose to retain: the wisdom of the ages or the contents of Kim K's closet?