another piece of advice...
in essays, i suggest u put some graphs in. this is an excellent method of complementing your words and simplifying things for the marker. if you can successfully blend your words with graphs, you are bound to get high marks.
when drawing graphs, always use ruler. also mark the graphs with a number so you can use this as a reference in your essay (eg. graph 1.2).
in regards to the essay plans...i think its good to memorise a certain structure. but the best course of action to take is to practice writing essays for numerous questions in order to perfect your technique. if you do this, providing you have studied all your theory thoroughly, you should be able to answer any question they ask at you.
good luck ppl, and pm for any advice