"...you pick one thing to put into place and the rest of it goes to pot, but if you succeed in putting that one piece into place then you have succeeded at that repetition of the kata. Then you pick another aspect and your first thing goes to pieces but eventually working at it like this more than one aspect begins falling into place at a time."
I tend to go in cycles of being (somewhat) comfortable, then overwhelmed in my training. Lately, I've been going through the "overwhelmed" stage again. Not in a frustrating way...more of a sense of awe/wonder at what a deceptively complex art aikido is (that is, how freaking cool it all is!).
Anyway, it can be tough to remember and do more than a handful of things during a technique (example: don't bend your arm, don't force it, move your feet, point your center at your hand, relax, etc). I'm going to use this in my solo practice, whether with the walking kata, or practicing with my imaginary uke. I'll consider it a successful rep if I get that one thing right that I chose to focus on.