I got references from people I trusted (a doctor for my 1st therapist) and a professor at the university who is in the Counseling Psych department for the 2nd. Both were good. My 1st therapist recommended the psychiatrist I see, who I think is the best around. I've been lucky.

ETA: Neither of the therapists I've seen in my current locale advertise at all because they're generally always full. It was comforting for me to know that someone recommended them who had worked with them before.