The most important element of your preparation is hands-on practice. You can either rent rack time or construct your own home lab. Expect to put in a minimum of 500 to 700 hours of practice rack time. The following link on the Cisco website provides a listing of equipment and software versions you can expect on the CCIE Collaboration Lab:
CCIE Collaboration Lab Equipment and Software List: https://learningnetwork.cisco.com/docs/DOC-20807
(NOTE: You must be logged in to access this page.)
Cisco also offers expert-level CCIE Collaboration training through its Cisco 360 program. You can find more information here:
The Cisco Expert-Level Training for CCIE Collaboration: http://bit.ly/collaboration360
In addition to your hands-on practice, you also need to do quite a bit of reading to deepen your understanding of key topics appearing on the CCIE Collaboration blueprint. A collection of recommended books are provided in the Recommended Study Resources section.
Many CCIE Collaboration Lab candidates also benefit from collaborating with other candidates during their study. You should familiarize yourself with the CCIE Collaboration Lab study group available at the Cisco Learning Network (CLN):
CLN CCIE Collaboration Study Group: http://bit.ly/collaborationgroup