I've thought about it. I've occasionally snapped a picture here or there. I really respect those of you who can do it, but I gotta ask, how the heck do you do all the nuts and bolt documenting as you go through a build? I mean, my garage has dirty car parts, oil on things, greasy hands, dirty gloves, etc. The last thing I'm thinking of when I'm elbow deep in an engine build and I find a bad part is, hey gotta snap a picture. Not only that, but I'd be afraid to pick up the camera with my hands in that condition.
So how do you guys do it, after the fact, have a friend along the way, or what?