revision?

 
      This is my second attempt of CA (Final) ! only 11 days to go now.Can u tell me how many times should one revise the course ideally? In my last attempt i  managed to revise Direct Taxes around 5 times & on the exam day i forgot everything & i failed becoz i fell short in DT by 4 marks!
       This time i have hardly managed to pull one revision & dont think i will be able to revise everything again.Is one & a half revision enough?

        What should be the strategy for the day before the exams