Prepare systematically...Start preparing different sections of the syallbus one by one...
English: revise basics of grammer and then proceed to 501 series books...
Eds: consult different websites like pakmcqs.com, examveda.com and 1000 most repeated mcqs given in success series book by suddha publishers... Eds book of CSS is v helpful for a holistic preparation
Maths: indiabix.com, maths and physics numericals of ssc and hssc books...
Pak studies: prepare subjective pak studies from 1857-present day and note down all important events with exact dates and personalities involved...
Islamiat: one liner mcqs given on this forum are enough but practice from pakmcqs and sheir websites
Current affairs: newspaper and monthly current affairs one liner by 'css nts information cell' Facebook page