This chapter provides resources and best-practice guidelines for planning interventions that have broad application to behaviors of everyday living. An overview of the theory and context for why planning is important to behavior change with a focus on current evidence is provided. Key definitions and research evidence of various planning concepts and techniques – action and preparatory planning, implementations intentions, and coping planning – are outlined. Subsequently, instructions are provided on how people can formulate effective planning interventions with examples of behaviors from various relevant prosocial, health, academic, and business contexts. Finally, current evidence and theory are provided with guidance on the types of planning interventions that may work in specific contexts and conditions, and on the moderators that may influence the effectiveness of each approach. Each section includes further details that are provided with worked examples of resources to use based on prior research and various modes of delivery (e.g., face-to-face, website, wearable devices).