Kirstin:  Mentoring can be such a valuable and rewarding thing for a mentor and mentee.  This is a good read, and confirms that knowledge sharing can be an amazing thing.  A big part of my job is supporting students, and keeping them motivated and pro-active with their job searches, and I have to say this is the favourite part of my job and can be exceptionally rewarding. 

 http://www.theguardian.com/social-enterprise-network/2013/oct/30/mentors-social-entrepreneurs