Taken from a "Statement of Style" I wrote in a creative writing class a year ago. Replace "writing" with "AMVs" and "editing."
I rarely invest much thought into my motivation behind writing. No, my pen hand isn't connected to my lungs. If I stop writing, I will not die. It's not a place to release all of my most inner thoughts. I am not fueled by any blazing passion or desire. Most of my genius thoughts float up to the surface somewhere between “Well, if the Pringles can has cardboard sides and a metal bottom, does that mean it goes with the tin... or the cardboard?” and “Lather. Rinse. Repeat,” when I am nowhere near a convenient pad of paper or keyboard – and I most often allow these thoughts to slip away, maybe to rise up again during a heated debate with a friend.
So to connect this to the thread, I think about editing the most in the shower or when I'm doing similar things completely unrelated to editing - and more often than not, the thought/idea flies away before I can pin it down.