A lot of people swear by meditation. I felt anxious and it helped a little, but my anxiety never really altered my scoring anyway so I don't know if it would have helped with that.
I think my biggest thing is to just be calm and focused on test day. My nerves made me score six points below my average in September. Gotta do some meditation and soul searching
I would agree that following the syllabus would be to your benefit, as you progress through LR you will realize that many question types play off of the same fundamentals. Its important to build the foundation b4 you start on the roof