There's not that much to do really. Make sure you sleep well, get a good breakfast and be there with plenty of time. Then just relax as best you can, focus and just keep on working. That's really all the advice I can give, I don't think there is much you can do to prepare and the tests are designed for you to come there without preparation so I wouldn't worry about it. Just do your very best and hopefully you'll be fine, good luck
