Memorising essays is good and all, but developing good exam technique to be able to adapt rote-learnt essays to the question when required is also fundamental.
I am currently filing using blank manila folders, but while it is a very economical option, I recommend using colour-coded binder folders. I have used these in the past and are fantastic for keeping organised and can hold a greater number of documents in protector sleeves in comparison to manila...
I find managing to comprehend the concepts within Extension 2 much more rewarding than simply getting the higher percentages in Extension 1 assessments. This and I find it much more enjoyable.