Quality Practice: A musician's guide is a resource for musicians and those who train musicians. The information and tools provided are grounded on current knowledge from the fields of psychology, neuroscience and pedagogy, and applied to the teaching and self-teaching of performing musicians. This publication is meant as a workbook - to be used in the practice room and in the lesson in order to enchance creative learning processes and stimulate quality practice. Susan Williams is one of the world's most well known specialists in baroque trumpet, and has performed and recorded with many of Europe's finest early music ensembles as soloist, chamber musician, and in orchestras and has also studied applied kinesiology as well as psychology. In addition to performing, Susan teaches at The Royal Conservatorium of The Hague and at the University of the Arts in Bremen, both in the early music department as well as teaching courses in practicing and performance preparation. She has been active in developing reform in conservatories to further develop the training of practicing and strengthen its profile in curriculums. Susan has presented at many conferences over the last few years on topics related to musician's learning, practice and optimal performance - in particular the role of attentional focus. Her doctoral research investigates what kind of attentional focus facilitates musicians' skill acquisition and optimal performance.