Pay special attention to a cool/useful new feature, click on the "exam topics" tab, and you will find the percentages for each topic. This should help to decide how much effort you should put into each topic.
15% 2.0 Layer 2 Technologies
40% 3.0 Layer 3 Technologies
15% 4.0 VPN Technologies
5% 5.0 Infrastructure Security
15% 6.0 Infrastructure Services
Within each of the subsections you can drill deeper for more details. This feature seems to have added to most if not all of the certification exams