Cleared PMP in the first attempt with 4Proficient and 1Moderate. 

Preparation:

Initially started reading Head First (4th Edition) . Wrapped up the book in a week or two. But took a long hiatus before I gave the exam.

By the time I registered for the exam, version had changed from 4th to 5th. So relied entirely on PMBOK.Here are my tips.

1.) Read PMBOK thoroughly. All questions were contained within the PMBOK.