Many of the most successful mentors are people who have experienced mentoring from the other side. Indeed, it is possible for a manager to be simultaneously mentored from above while he or she mentors someone yet more junior. One of the major difficulties in getting a mentoring programme off the ground is finding an adequate supply of mentors. Once the scheme has been going for many years, however, it automatically generates potential mentors from the ranks of former mentees. This is actually one of the litmus tests for the success of a programme - what proportion of mentees want to go on to become mentors?