This chapter examines how children come to differentiate themselves and how they learn to view themselves from others' perspectives. It discusses how language learning is intertwined with acquiring these two capacities. The chapter also discusses the relationship between computer-mediated communication (CMC) and other forms of communication, and the role of CMC in self-presentation and in relationships. It focuses on CMC as a potential influence on the development of self. The chapter examines some of the tactics used in impression management. It also discusses managing appearances, ingratiation, aligning actions, and altercasting. The chapter considers embarrassment—a spontaneous reaction to sudden or transitory challenges to people identities. It also examines cooling-out and identity degradation, which are deliberate actions aimed at destroying or debasing the identities of persons who fail repeatedly. The chapter analyzes the fate of those afflicted with stigmas—physical, moral, or social handicaps that may spoil their identities permanently.