A mentor is foremost a good listener.

Sure a mentor's advice and guidance are valuable, but primarily the mentor is someone to be trusted to help you work out your own best practice. If you need someone who will listen to you and are prepared to hear an objective perspective on matters of importance to you, a mentor will be of value. Whether thinking about issues at work, whether attempting something solo with no-one else to confide in, or whether you just need some honest feedback in a safe environment, a mentor can help you address and resolve issues that will leave you in charge of your situation.