You should have a ten minute break in there somewhere since your shift is longer than 4 hours if I remember the labor laws correctly. A ten minute break isn't much but it's something. Wish you could listen to music through your phone. I suppose an iPod isn't allowed either. Just focus on your breathing and nothing else. Well, focus on your job enough to do the bare minimum, but otherwise focus on your breathing. In, out, in out. Take deep breaths every few minutes. Just get through the day.