Hi guys,
You can't rote-learn english like you do maths. There is no 'one' way, and there is no 'one' answer. Rather, you come up with your own argument and you use evidence from the text to support this argument/theory.
In a nutshell, you need to understand the module (and thus, what they want you to learn) and what it requires you to do (and thus, how they want you to respond). I'm dislike pre-prepared/memorised essays with a passion, because you're not learning anything, and the argument won't be structured to directly answer the question they're asking. This is the difference between a Band 6 and a Band 4 essay... regardless of how much "stuff" is in there, if it's not written well and if you don't answer the question, then it's not cool.
What I *do* suggest is that you look at the sort of questions they like to ask. Particularly for Eng AOS and Eng Adv, there is a lot of generic information that will pop up in every essay. Make a list of these general topics, and if you must, memorise *these*, and ensure that you only use them as evidence to support your argument (you must argue your answer to the essay question!).