As you know that CSS candidate has to manage 12 subjects and you people has limited time. But newspaper plays key role in CSS preparation,for instance,
It helps in preparation of current affairs and also helps in some papers directly. It also helps acquiring material for Essay.
Furthermore, it helps you in many ways indirectly for English Composition i.e. Vocabulary and precei practice. It can build your opinion and can help acquiring facts and figures and updated knowledge for many of optional subjects as well such as sociology, journalism, international relations etc.
First of all make a register of current affairs. Divide it into three main portions:
1:MCQs
2:National Issues
3:International Issues

--> MCQs
This portion will be reserved for sifting material for MCQs of current affairs paper. Following are key areas for MCQs;
Names of Presidents , Prime Ministers and other heads of states of key countries-
Capital cities of the important countries of the world,
Heads of international organizations such as World Bank , IMF , ADB etc. News agencies
Currencies, Major international events,
Major international sports events etc.

--> National Issues
Make sub sections of various national issues confronting Pakistan that are likely to be asked in the forthcoming CSS examination.
For Example
Balochistan issue
Water crisis
Energy crisis
Sustainability of economy
Terrorism
Over population/ Census etc.
--> International Issues

Make sub sections of various international issues confronting the world that are likely to be asked in the forthcoming CSS examination.
For Example
Middle east
Afghanistan
Palestinian/ Kashmir issue
Chinese supremacy
Rise of Russia
Foreign policy of US etc.

For reading purpose, you can divide newspaper (here from newspaper you will assume DAWN) in four sections
1-Main page
2-Editorial page
3-World in focus
4- Opinion
Main Page and world in focus
Keeping in view above sections, have a look at the main page and read those pieces of news which are related to the above issues only. If there is any major or important development in those issues than note down in the relevant section only the development not the whole story.
If there is no news related to any of the above issue than those who have recently started reading newspaper should read at least one piece of news from main page or world in focus.
Editorial Page
Having cursory look at other pages, move on to the editorial page. Editorials are a MUST DAILY read. Read main article for two months continuously if you are a fresh reader, than you may skip if you feel like it being the repetition.
Similarly, note down the important facts of the issues in their respective sections.
Opinion
In this section the writers discuss different current events. Their style of writing and the way of looking at various issues is worth noting. Study at least one. Note down the way they take up and analyze the issue.
Best of luck to all of you.