I went to my University counselling center with a name offerred by a friend, but also checked him out on the Univ web-site first. I'm an academic, so credentials are important to me and I knew my issues were deeper than having arguments with a room mate, so I didn't want an intern or MA-level therapist. Mine turned out to be the chief psychologist who also supervised the post doc interns. He had the credentials and expertise I felt I needed, and I felt a lot of confidence in him after our first session. Very lucky.