My colleague Erin K. Tierno, LCSW-R wrote this fantastic introduction to how to find a therapist. She's located in Colorado, unfortunately for all of us on the east coast, but her wisdom is applicable everywhere. Visit her site to learn more about her approach to looking for a new therapist:
This is also a great time to link back to an old post of mine, How to Choose a Therapist.
And of course feel free to reach out and ask me any questions if you're starting your search in the Cambridge, MA area.