I think current affairs is not that much difficult if we have updated knowledge of the events along with their historical perspective... As we all know that it is divided into three portions, domestic, regional and international.. and nowadays the paper setting trend suggest that the examiner is more focused on domestic issues. Moreover, prepare 5 topics from each section i.e. from domestic, regional and international .. and you are done .. don't waste too much time in reading ir-relevant material .. these I think are the golden rules...

and have a look at these notes.. I have complied these from the website of institute of peace and conflict studies:

https://drive.google.com/file/d/0B2e...ew?usp=sharing

https://drive.google.com/file/d/0B2e...ew?usp=sharing