Don't underestimate the power of completing practice papers. The more practice you do from a wide range of different texts, the more prepared you will be for the real exam.  It is at this stage in the year that practice becomes very important and know your exam paper; the type of questions you'll be asked and layout of the paper is vital to achieving the grades you want. 

Don't leave this until the week of the exam. Get started as soon as possible and ask your class teacher for feedback; that's what we're here for!