I have been using this forum from last couple of months and it gives me pleasure to mention that I cleared my PMP certification exam today.

 Materials Used - 

• PM-BOOK - 4th edition 
• Rita  PMP Prep Book - 6th Edition
• PMP Exam Simulation (s/w) for Questions Practice 
• PM - Zilla for Useful tricks , Good reviews
•  Following free Sites for Question preparation
  • oliverlehmann (Real Test)
  • Headfast PMP questions
  • techfaq360
  • pmstudy.com
  • preparepm.com
  • bestsamplequestions.com
  • tutorialspoint.com

A regular study of 2 ~ 3 hours daily, for ~3 months worked for me. Remembering ITTO's is not really required ; A well-balanced and thorough study of PM-BOOK is quite essential as every line in that book can be a potential question. And above all, practice-practice-and- practice questions as much as possible - This will make you perfect !!!

All the best guys !

- Raj