I second your views about IR. Needless to say, IR is one of those subjects which shall be covered in wider range of techniques. With the new trends of this paper, one shall equip herself/himself with meticulous reading of various sources, but quality of reading is the key element to get attached to the true spirit of this subject.
I would also like to add here that for covering IR in the best possible way, we shall reproduce current affairs in such a way that it would cover IR's jargon. Firstly, get yourself familiar with concepts. Secondly, make bullet notes of topics. Thirdly, apply those theories and concepts to contemporary global issues. Last but not least, keep writing answers for polishing your exam demands. Viola ! you are all ready to sit in IR exam.