Economics is all about
getting the right points for the topic/essay question required.
In general, the more you read from those reference points, the more points u can draw out from other people's works. The plus point to help u excel in Econs, is to
develop your own points. That means, given a certain question, can u relate it to the current economy today? or how can the current affairs today affect the various industries today? wat is the impact? etc etc....
Econs is actually easy and interesting if u can see how all the points in the notes or textbook links to today's world as well as major economic events in history...... of coz be as "kiasu" as singaporeans and u must include ALL points that other ppl use in their essay (plus ur own points).. hee hee....
Oh!! and for A levels, MCQ, practise ALL MCQ questions, best is practise even up to 20 yrs ago's questions. haha.. many questions are repeats and come up every other year again and again...
The key to MCQ is ----> PRACTICE.
Is there still a section call data response or something lydat for A levels? That one... God bless u!!....

haha.... that one juz answer the questions directly and throw in watever points is useful from the paragraphs of data.. haha
good luck! I kinda miss economics during my jc days..... a pity i did not take that in university....