I decided to take my first Microsoft exam yesterday and I bombed!

I took the 70-680 Windows 7, Configuring exam. I scored a 525. I went into the exam with way too much confidence because I have worked as an IT professional for about 8 years now and have configured and deployed Windows 7 successfully. I was wrong. That was the hardest certification exam I have ever attempted.
I have decided to start over and read my training materials front to back. Even if I feel like I know a topic I'm going to read it anyway.
For anyone that has successfully passed 70-680...what training materials did you find to be most helpful?