Writing: Remember to use pencils rather than pens. I used my pen and had to make some corrections and strike-outs. If I had used a pencil, I could have erased those instead of having to strike them out. Add to that the fact that my handwriting sucked! Practice writing neatly before you go to the test..
As a result, I scored low on my writing. My total score was 8.5, though. I really wanted to ace the test and I was kicking myself that I didn't plan ahead on the writing and let it take me by surprise.
Listening: The volume on the audio is more than adequate. Do not get distracted. If you don't listen for even a couple of seconds, you're not going to be able to answer a question. Focus and you can ace the listening.
Speaking: Practice speaking on random topics with a friend. If you're naturally a good speaker, this will be a cinch. Just pay attention to the umm's, like's, you know's etc.. if you're prone to them.
Reading: No biggie. Just double check your answers. I had a lot of time left over at the end of the section.
Good luck!!
Cheers,
A.