Hi Sobha,
I planned to write by May this year and read PMBOK & HeadFirst once.
But, some family matters came & PMP prepration stopped. Again, started
reading Rita Mulcahy around September and completed this by Oct mid. Started
going though
some questions in web and in Nov 1st week, tried the 175 questions in
oliver lehmann and got around 67%. Then, decided to schedule the exam asap and
got it for 7th Dec.
From then, I spent 2-3 hrs daily. I believe the questions in examcentral
& pmstudy were almost close to what I saw in PMP exam. Took 2 mock exams ( 1
from examcentral & 1 from pmstudy). In all these, got around 73-75% which
was the main reason for my nervousness (as I read in most blogs around 80% is
required for writing the exam). But, finally things went well.

I tried to go through as many questions as possible (75 questions in Oliver
lehmann, pmexam, headfirst, christpher scordo in pmbok website, PM exam
simulator etc.) and whenever I made a mistake, tried to analyse it properly.
Also, I tried not to miss completely the PMP topics touch after our course
completion.
All the very best!!
regards
Sreekumar