Youth mentoring programs have been on the rise for the past few decades, yet little has been done to synthesize best practices, as identified in existing research, for programs or mentors to follow. In a review of the literature on mentoring, eight different types of mentoring relationships were identified along with four program best practices and six mentor best practices.Youth success outcomes and measures also are shared. Adhering to these practices will strengthen programs, lay the groundwork for more formal measurement, and provide the best possible mentoring for youth. (Contains 1 figure.)