The book "Efficient Practice" by Wolfgang Meffert offers a comprehensive guide for musicians looking to optimize their practice habits. It is often assumed that simply practicing is enough to make progress. However, Meffert demonstrates that it is not just about the quantity, but especially about the quality of practice. In this practical guide, strategies are presented that enable musicians to practice more consciously and effectively. Readers will learn how to think through and understand their practice sessions in order to improve their musical skills purposefully. This book is aimed not only at guitarists but at anyone who wants to elevate their musical abilities to a new level.