In the current affairs sub-forum, download the "Most Important Questions". The moderator has arranged the questions topic wise. So topics will be

- Questions related to Pakistan's history with Democracy
- Corruption and Good Governance
- Pak Us, Pak India Relations
- Kashmir Dispute

etc

So you know what topics and questions are asked in the exam. While reading the newspaper, focus on those topics. For instance, you dont need to note important points regarding the diatribe between Rana Sanaullah and Babar Awan .. But you should carefully read and analyze articles on Government's performance, foreign policy etc.

In the beginning, read the whole newspaper but after a month or so, you will yourself know which topics you should and shouldnt read