In my peer review I would actually read the paper twice, the first time I would focus on main points, I would make notes about the overall scope of his paper. For example I encourage him to sake a solid stance in his paper, one way or the other it will provide him with a much clearer path. In the case of the essay I was working with, these made it much easier to work on a local basis because many of the issues would be fixed with a change to the overall point of the paper. Many came from confusion over what exactly they were trying to prove. I also suggested a few sentences that should be removed completely, in doing this the major points of his paper can be further refined since all unrelated sentences have been removed. In doing this the revision becomes a little bit more global since it fixes two issues at once.
