Cleared PMP today. Thanks to pmzilla for giving the tips. Had spent nearly 2 months for the preparation. Started with Rita's book and was not able to follow intially, so had Andy Crowe which explained the concepts in very simple manner. Next I used Rita's book. Never read PMBOK end to end. Whenever I had some doubts , used to refer PMBOK ,that's all. Had some questions regarding SOW which I didnt' prepare ( I feel).. Mathematical forumals were all simple and straight forward using the formulas in Rita's book. Took examcentral exam and head first pdf as mock.