I think that is where writing as you go can help a bit--it is one thing to read an article, it is another thing to have to write about it and relate it to other things you have read. One thing that might help is to do a short precis of each article you have read ( whether or not you are told to do any writing at this stage) and part of that should be trying to relate it to other articles--are there similar themes? differing points of view? the same questions being asked, but not pursued by the literature? My supervisor suggested keeping bibliography of what I read, and starring those articles that seemed of particular quality and value, to separate them from those that were not--there IS a wide variety in the quality of articles available, and that said, even among great articles, you may find a particular point of view or writer resonates with you in a way others do not, and that is well worth keeping track of!