Sir u do not need to remember a large number of data, quotes and material etc..
Eds..
Select one book and study from it.. if u have science background go for Encyclopedia of eds.. if u dont have science background go for Kashmiri's book.. study the topics from syllabus.. if u want to be precised and specific than make ur guess paper from past papers..
Current affairs..
Make ur knowledge healthy by newspaper (any 1, preferably Dawn) and see the nature of past papers.. try to make ur hypothesis regarding questions expected to appear and make ur notes in points..
Thats it..