Question regarding Physics GRE

[Ternwild]

I took the pGRE already once and got a less than idea score.  I will be taking it again in another 6 months.  What is the best study material, besides the previous exams (I know about those already) that you used to get your pGRE scores up?  A book?  Study guide?  Textbook?  Trying to get an 800+. 

To be clear, I am talking about the physics subject test. 

[riverscuomosworstnightmare]

not sure if you're still looking for tips, but i found kahn and anderson's "conquering the physics gre" very helpful