It's huge - 13,884 pixels in height - and vaguely long. It also has typos and spelling errors, but I'm not going back to fix them right now.
Anyway, I've always had people asking me how I do hair, and a while back I did go into one of my files and take a bunch of pictures to sort of give an example of how my hair is put together, but it wasn't a step-by-step, during-the-process sort of tutorial.
So when I was getting ready to make hair for this model, I decided to just take screenshots as I went, so here's the results. Hope it clears things up for a few people, since this is one of the more common questions I get.