I found the test feedback usually to be quite useless. The entirety of all subjects on the test summarized into as little as four sections is not at all helpful. Perhaps for others it has proved useful and I do NOT mean to discredit them, but rather to say it didn't work for me. And, I have a hard time imagining KiscoKid to have flunked any Cisco test. ;-)
The best method I found to handle failure was to do a "brain dump" after the test. (Anybody who has been here a while remembers my struggles) As soon as you get out of the test, grab a notebook and write down any and everything you can remember not knowing. Subjects, questions, commands and anything else that comes to mind. I would keep my notebook with me all day writing down random things whenever I remembered them.
Be specific; you'll be amazed at how quickly you forget what you missed! Two weeks later you will not be able to remember most of the things on the list. Also, if you spent a long time studying for a subject and you do not find it on the test, make a note of it. Every chapter you can skip frees more time to study the material that WILL be on the test. When you are finished, you'll find you have a great study guide for the next test tailored to your particular needs.
Good luck!