This edited volume starts in on the task of integrating the problem of procrastination into philosophical inquiry. The focus is on exploring procrastination in relation to agency, rationality, and ethics-topics that philosophy is well-suited to address. Theoretically and empirically informed analyses are developed and applied with the aim of shedding light on a vexing practical problem that generates a great deal of frustration, regret, and harm. Some of the key questions that are addressed include the following: How can we analyze procrastination in a way that does justice to both its voluntary and its self-defeating dimensions? What kind of practical failing is procrastination? Is it a form of weakness of will? Is it the product of fragmented agency? Is it a vice? Given the nature of procrastination, what are the most promising coping strategies?