How about failing twice with the exact same score! I pretty much bombed on Group Policy, getting less than 20%

, my score both times was 556. My 3 weakest include: Group Policy, Active Directory, and Network Services. On the plus side, I got over 85% in Hyper-V, which is good because I hope to specialize in virtualization in the future.
I pretty much used every resource possible while studying: CBT Nuggets, PluralSight, MVA, Microsoft books, SkillSoft, MeasureUP, TechNet, etc. It's pretty embarrassing, especially since I use AD everyday in my work.
Some recommendations: Know IPv6 (all of it, including subnet masks), Polices (including where to change specific settings), Printers (including permissions, when you can print), PowerShell (pretty much every second question involves it in some way), know how to calculate how many computers you can use with a subnet (eg. 2 to the power of X), Hyper-V (storage, networking, manager settings). I will include more if I think of any.
That's it, I just wanted to share and let off a little steam. I'll study some more and eventually take it again, I might try a Transcender test this time. If you have any advice, please let me know!
One more thing, if you are scheduling an exam, choose Pearson VUE over Prometric if possible, the experience is a lot better.