My OCD is very diverse. Get something stuck between my teeth, know that floss or a toothpick or a brush or whatever will easily get it out. But, no. Have to work at it and work at it with my tongue. The OCD demands that method. Giving in to an easy method is like a huge surrender.
I will page through memory for hours on end trying to track down something very obscure. We have a neighbor with a rather annoying voice. The first time I heard it, I said to myself "I have heard a tonal quality VERY similar in someone's voice in a movie....now which one was it?" Finally tracked down the memory and matched it. It was a very minor character in the movie 'Trading Places' which I had not seen in a lot of years....and the character had very little screen time.
I find that I am quite good at recognizing actors' faces and voices quite quickly, as they are today, even if I have not seen or heard them since they were much younger in movies decades ago. I sort of visualize an overlay that starts blinking when there is a match. Reminds me of the whale song search in TVH.
So, I guess OCD *can* help strengthen memory, with those exercises.
But when a memory just won't come, and I am proverbially ready to bite my fingers off from frustration (it
can build up to almost like a panic attack) and have to consult the internet to look up an actor....that's another huge surrender.