This article sketches a historical account of the author's personal journey in mobility management research. After brief discussions on mobility management in cellular networks and wireless internet, an information-theoretic framework is presented for mobility learning and prediction having applicability to a variety of settings including smart services and activity recognition. Next is highlighted the importance of privacy-preservation in location-based services and mobility models, followed by the implication of human mobility and behavior in opportunistic networks in the era of the Internet of People.