Mentoring is now commonly accepted as a valuable activity for youth; but good press, good intentions and earnest desire alone will not enable mentoring to reach its full potential. There are still operational questions to answer and real-life barriers to overcome: What are the essential elements of an effective mentoring program? How do you measure and document the quality of a mentoring program? What does mentoring cost? Where do we find volunteers? Without answers to such key questions, mentoring's potential will never be realized. This volume, sponsored by The Commonwealth Fund, reviews what the field has learned to date.