Ideally a candidate should revise all subjects including medicine,surgery,pediatrics,psychiatry and public health for at least 3 times from books like John Murtagh and Harrison's internal medicine.
Then the candidate should practice all available recalls and try to find answers from these books. Also highlight the topics you see in amc recalls or past papers. As there is tendency to change the scenario in the real exam, so it is worth knowing every thing about the topic used in recalls or past papers.
If you have subscription with amc qbank,you should use it daily to review 50 MCQs daily at least.You can use questions as many times as you like.
Repeat MCQs stay longer on the memory disc!!
The whole process usually takes 4 to 6 months if done as full time responsibility.
Source:
www.amcqbank.com