PSAT Help bad score!?

Hi everyone, I am a Sopre and I have a 4.2 GPA including AlgII/Trigg and AP Human Geography, plus other courses. I received my PSAT score and I got a 151 and here is the break down.....53 Reading......49 Math....... 49 Writing. Ironically, I am very strong in all of those areas, especially math. Given the cirstances, I did not study AT ALL for the PSAT and that was also the first time I had ever seen an exam in SAT format. Also I'd like to mention that I came back from my trip to New York (I live in Singapore 12 hr time difference). BUT BUT BUT! I purchased an SAT prep book and I actually find it kinda challenging; I'm very worried that I will get a bad score on the real thing. I am currently trying to prepare and I am aiming for a score above 200, I really believe I can do it, but my lack in test taking skills will probably hinder me - what should i do?