The following is an excellent overview of strategies concerning effective graduate student mentorship by Dr. Nathan C. Hall, Associate Dean Graduate and Postdoctoral Studies at McGill University.
Self-assessment: how good a mentor are you? (Nature)
A 2007 article in Nature (Nature's guide for mentors), explored the components of mentorship that constitute best practices across a wide spectrum of disciplines. The appendix to this article was a self-reflection exercise, which asks: Is there anything you can learn? More importantly, can you improve what you do? What examples of exemplary mentoring activities do you use? It asks for the provision of specific examples. It is intended to be an effective way to stimulate reflection on your approach to scholarly mentoring.