My neck is, by far, the most difficult terrain for me to shave. Like others have mentioned, the stubble goes in so many directions its practically impossible to be precise about the grain. If I get too aggressive, a nick is sure to be the result. The best solution I've found is to stretch as much as possible (as illustrated in straight razor technique instructions) and do the best I can.
Back when I started, I carefully mapped my face, trying to get it all "right". I found that doing so kind of made the ritual a chore....so I quit doing so.
As with many things, relaxing a bit and keeping things simple helped a whole lot. I must have a hard head, cuz I keep needing to remind myself of that!
Middle of MO
“Much of the social history of the Western world, over the past three decades, has been a history of replacing what worked with what sounded good.”
"The cost of freedom is eternal vigilance."