I scored 594. Very disappointed

I studied really hard for 1 month. Used Sybex for main study and then completed exam quizzes from MS book and Examcram 2. Still couldn't do well.
It was much harder than i thought ( or may be for me). No questions on performance monitoring, min hardware reqirements. Lots of questions on security.
I need to give it again. Don't know what to study now. Any good exam preparation site or book??