The biggest thing that will help during this exam is confidence in your preparation. There has been a lot of talk about the lack of study material available for people wishing to take the test. The CIPT1 6.0 book (Cisco IP Telephony (CIPT) (Authorized Self-Study), 2nd Edition), by Jeremy Cioara, is a great resource to prepare. Let’s face it: not that much has changed between theses two versions of the exam.
Your best chance of studying for this exam is to take the topics listed one by one and make sure you know how it works, what steps are involved to make it functional, the correct order things are configured and how it interoperates with other components. The CIPT1 8.0 exam requires you to have a very deep understanding of Cisco Unified Communications Manager, Gateway configurations. The one topic not to overlook is the functions and locations of the Features and Services required getting the CUCM functional. You should also add Media Resources to an area that should be known.