This book is for experienced amateur astronomers who are ready to take a new step in their astronomical journey and use their skills to help farther advance science. Written by an astronomer who is well known amongst the amateur and professional community for the skill and quality of his work, this book describes a wide range of research areas where amateurs can gather new scientific data that is then utilized by professional astronomers. For each research area, the book provides a concise explanation of the purpose and value of the amateurs' observations, a description of the equipment that is needed, specific observing procedures, complete data reduction instructions, and an explanation of how, and where, to submit results so that they will be available to the professional users.