Do mindmaps. Draw connections between themes, between characters.
Writing essays is only useful when you have fully developed your ideas, and your attempting to frame them as succintly and coherently as possible. In a way, English is similiar to other subjects, in that you have to develop the base, the foundation, and the knowledge before you can attempt to throw it all together. 'Spamming' essays only gets you so far...
Take key quotes - jot down some thoughts relating to them. Grab an essay topic. Dissect it. Uncover the layers of it, and work out the links between the associated themes and characters. Once you have done that... writing the actual essay becomes kind of superfluous. Obviously, you need some practise developing a clear prose. But, again, there is only so many times you can do that.
Really, I have to discourage throwing down generic paragraphs. Understand the text, and you won't have to. Generic paragraphs will never fit neatly in with the topic - and you will be penalised accordingly.