My little knowledge and after thorogh reading of past 5 to 10 years paper i came to know following things which may help in securing better scores..

1. true perspective of islamic ideology, meaning your thought must reflect the original idea and should not be ambigous. in order to achieve this, one must read out some of the well known authors.
-- Maulana mododi
-- dr zakir naik
-- dr hamidullah
-- karen armstrong ( her books are famous on Islam and Prophet Muhammad (S.A.W.W)
-- friday features.
2. most of the recent past papers show that burning question regarding religion and especially ISLAM are asked which are not simple narrative instead a solution is asked for instance; Islam and Terrorism, Islam and woman, Islam and human rights, Muslim ummah challenges.
3.try to memorise some of the ayats and hadiths which cover these topics coupled with some famous western writers like burtand russel (even though he was atheist yet he has focused the need of religion in human life)

if we take this paper as our intrest we can make most of it. but need is to be a moderate muslim.
last but not the least... cover all those topics which come under the domain of islam and happened throughout the year all around the world!
regards