Vidding Exercises for Creative Distraction

I was wondering if people have tips for finding visual matches in your source. I'm pretty good at remembering things that happen, but remembering something like a circle, a flame, a door closing, something in someone's hand, or which way the camera was moving -- those things just pass by so quickly. I guess if you're working with a limited amount of source it's not so bad, but the Untamed is 50 episodes. Yet people get the most amazing details into their vids.