I've been doing for nothing what I generally get paid to do for a long time. That used to be solely as a Business Mentor for The Princes Trust. For a number of years I've also been doing that for Buckinghamshire New University.
They've recently started giving mentors the chance to say a few words online to encourage new mentors, and indeed new mentees, to step forward. I was delighted to be given the chance to say a few words, and you can read what I said at http://thebucksgraduate.
Re the words there from my mentee, and from the University, it's nice to be appreciated!