This handbook is designed as a reference manual for front-line extension staff to use in their day-to-day work. It offers a set of tools for effective communication, program planning and evaluation. It is meant to support and educate agricultural extension workers worldwide. The intended audiences of this handbook include: governmental agriculture, fisheries, natural resources and community development ministry officials; governmental and non-governmental extension district/regional managers; extension-related faculty and their students—preservice extension workers; and field-level agents, whether governmental, non-governmental or for-profit. We hope that this handbook will help advance efforts to empower and continue educating extension personnel through in-service training opportunities, continuing education programming and “train-the-trainer” programs. Such efforts may include targeting specific tools of interest to audiences and inviting scholars/practitioners to teach participants about them.