PM Zilla and other links helped a lot in preparation for my PMP exam, it is so tough but i managed to get through, as I passed PMP I would recommend to anyone who is interested in taking the PMP Exam." 

Tips :

Go thoroughly with PMBOK phrase by phrase - take short notes as possible

Read Head first 2 times - take short notes ( for quick refer)

Do PmZilla, Oliver, Crosswinds and PMPerfect questions

No hesitation, you will be passing the exam at first attempt - guaranteed