So I've just had my second piece back this year which has been tagged as a revise and resubmit. Overall I'm happy with that result (it's better than a rejection, and was aiming for a good journal!), but I'm struggling a little bit with how to actually do the revisions. For both pieces, the reviewers reports were quite brief (for this second piece, very brief), despite the fact that they've asked for the argument to be totally overhauled. I don't therefore have a lot to work with in terms of where to take it in the overhauling process. For the first piece, I resolved this issue by taking far too long over the revisions, until I had gained the distance to write a new (similar, but better) piece entirely, from which I jettisoned all the bits which were previously unpopular. That won't be an option with the second piece, because there's a much shorter time frame envisaged.
So, the question part - how do you normally go about working out what to do if asked for a major revision of the argument (I should perhaps say here that I am in the Humanities)? How do you start the actual process of changing your ideas, and coming up with a new argument? Are there any methods/exercises I could try, to start building up a better technique for this than just waiting until I've left enough time for my research to have changed by itself?