Counselors can address their own biases in therapy sessions by engaging in ongoing self-reflection and examining personal beliefs, seeking regular supervision and feedback from peers, attending cultural competency training, and being open to feedback from clients about any biases they may observe. It's crucial for counselors to remain aware of their own biases and actively work towards overcoming them to provide unbiased and effective therapy to clients from diverse backgrounds. Additionally, counselors can also use tools like self-assessment questionnaires or cultural humility exercises to further explore and address their biases in therapy sessions.