hello there,
stick to study notes,
study all the important areas,
revise all the past question papers (dont expect them all to come in your exams, mind that it is only giving you a platform to feel those important questions when asked, how to present your selves... that is all, other wise it is just a b com exam and not ca exam.. )
expect the unexpected question
dont leave any topic for exams
revise revise revise.. at all times.
take rest inbetween study hours
study atleast 12-14 hours a day.
Recollect what you have read when you are free
all the best!