I think its a bit too late now, but...
I prepare essays, in order to perfect them
I did about 10 on a variety of essay topics (very broad, mind u), because by preparing a response to a topic, u know exactly what u want to say, what order u write to, and how u write it
It may be different for different people, but I find that I write more sophisticated and accurate essays when I prepare them, rather than trying to create one off my head, because exam stress can screw with your logic
so yeah, for the next 2 days, try and plan a structure for the extended response, ie - under a heading for each major topic thats likely to be examined, write several dot points about the major issues/concepts that are in that specific topic, and play around with words to create sophisticated and coherant argument
linking is very important in extended responses to, so make sure everything u talk about links in to the underlying argument
hmm i kinda rambled on there...