
Oprah Winfrey said "A mentor is someone who allows you to see the hope inside yourself."

So it is important that in seeking out a mentor, it must be someone with a positive outlook to life - theirs and yours. Without a positive outlook to their own life or feel motivated to move forward, how can he/she empower you?

Reid Hoffman, the co-founder of LinkedIn put it well: "One of the challenges in networking is everybody thinks it's making cold calls to strangers. Actually, it's the people who already have strong trust relationships with you, who know you're dedicated, smart, a team player, who can help you." A good mentor should exemplify good networking skills.

Indeed nothing is learned until something is taught...and something is caught. So it's not enough for your Mentor to be a good "teacher," you also need to be a good/willing learner.
Remember "Learning is a treasure that will follow its owner everywhere." ~Chinese Proverb

Optimistic: You need to seek out and have a mentor who is an Optimist. Now that is not to say that the person should not be realistic, but like Helen Keller said: "Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence."
This ties in with what Bob Proctor said "A mentor is someone who sees more talent and ability within you, than you see in yourself, and helps bring it out of you."

Face-to-Face meetings are encouraged but answers to questions or guidance can be provided by email or over the phone.
Wishing you a productive Mentoring relationship...and in time, if you're not already one, you'll become a value-adding mentor to others who come in contact with you.
Another good resource: http://franchisegrowthpartners.com/mentoring
Reference:
* http://mediarelations.illinoisstate.edu/identity/1213/nov/Hitchcock.asp