I think most therapists advocate letting the memories come. If you try to force things, you might misremember, or re-traumatize yourself because you are not yet ready to face the memories.

My memories have come as I felt safe enough in counseling to discuss them. They would just...bubble up in my mind, and sharpen over time. Both my therapist and I have strongly suspected sexual abuse in my past, but I don't remember anything specific. I figure, if my mind isn't letting me know, maybe I'm not ready for knowing.