There is really only one method behind paleographical study. If you want to read a medieval text you stare at each little scribble, or graph as the scholars like to call them, and you try and figure out what letter it refers to. Once you think you have it figured you move to the next scribble. When you hit a gap in the text, and you think it’s probably a word division, you look at the list of letters you wrote down and see if it makes a word. That really is all there is to it, at least from the perspective of the transcriber.