This document discusses self-destructive behaviors including direct suicidal behaviors and indirect harmful behaviors. It provides data on global suicide rates and describes different types of suicidal behaviors ranging from threats to attempts to completion. Risk factors for suicide are examined including demographics, psychiatric disorders, physical illness, and psychosocial factors. Methods for assessing suicide risk such as the SAD PERSONS scale are presented. Interventions for managing individuals at different levels of risk like contract making and observation are outlined.