I've stated this a few other places, but meditation is KEY. I'm no Gandhi and haven't been trying to meditate for more than a week, but once I was checked in, I sat there for about 5-10 mins (before I walked to my computer) and focused on my breathing. I went in semi-calm.
At the break, I ate my Special K bar, used the restroom, then went to the computer with about 10 mins left in my break. Sat down, closed my eyes, and just focused in breathing and chilled.
The second time meditating REALLY helped, as I made 22s on both RC and QR, and it was my first time takig the test. I will also be retaking in December as my other scores were all 18 or below.