The current data-based review encompasses 30 years of research involving parental use of time-out (TO). Although extensively researched for decades, parental usage of TO continues to vary widely across a number of procedural variables. As such, the current review provides descriptive data for 40 articles published between 1977 and 2007 along both participant-related and TO procedural variables. Although results indicate wide parental usage of TO as a behavior management strategy, the application of specific procedural variables remains diverse and often unable to be ascertained. Based on current data, the review also includes specific practitioner recommendations and cautions in easily accessible bulleted form related to parental use of TO.