Work out the small details of test day, like how you are getting to the center, what traffic will be like, what items you want to bring. Spend some time making all of the periphery tasks easier come test day. And as Zenabi said, pound passages and questions. Make a 'cheat sheet' of simple mantras before any homework set or practice exam you do. One suggestion we make to our students is to pound easier questions the last week, because you need to make sure your confidence is in the right place. The last thing you need this week is a killer passage that undermines your confidence.