How to revise English Lit/essay subjects in general Watch
For English Lit: Learn quotes and key themes, might also be worth investing in a revision guide. Use class notes and your teacher should tell you how to structure your essays. Also, look at the AOs for your exam board, for OCR certainly it's just a case of hitting them to get good marks.
For essay subjects: go on the exam board website and there should be a specification, structure your revision notes around this. Again, as with English your teacher(s) should help you with essay structure
Hope this helps,please feel free not to do what I've suggested, feels a bit dangerous giving someone else advice!