Get yourself onto GCSE Bitesize and revise only the areas that you find more challenging. Do NOT revise for everything, remember only key information, because you do not have time to do major revision.
Most of all, ensure that you know all of the language features that you have covered in class, but also how they are used by the writer of the text to engage the reader.
And practice using PEED, which is Point, Evidence, Explanation and Development.
Remember key quotations from the texts that you are being examined on to support your answers.