first thing get the ADA syllabus for part 2 from its candidate guide at its website. observe it carefully, arrange your sequence of subjects starting with the weakest subject first. Make a list of your customized syllabus.
Make mosby review as your basic standard book.. read it from front to last. Do decks side by side... 2 months for these 2 should be enough. but you really need to stick to regular studying...
month 3 : do questions from anywhere you get eg kaplan q bank, first aid q and a book, released papers, mosby's cd
I did this way, passed in first attempt.. good luck