Look, what I think is that everybody has to find his own learning style, what works for you, but there are some general recommendations I usually give to my students:
-make sure you understand what you are studying
-change subject every 50 or 60 minutes and have a short break (5' / 10') between subjects
-don't try to learn the whole thing in one session, some scholars say human brain can only intake new knowledge for about 10 minutes at a time, so the rest of the time should be devoted to repetition or practice of some kind
-eat and drink healthy and sleep at least seven hours a day (this is really important)
-don't study anything just once, you will forget
-don't study too much the day before the exam, but start studying good in advance (it would be better if you studied every day from the beginning of the term, but I understand...).
-Maths need a lot of practise, go over the exercises again at home everyday and check you understand every step.
The rest, I guest, depends on your cognitive style, I need to see the whole thing, so I make a very general overview and later on I start to fill in the details, then how they interact and so on, the last thing I study are names and dates, at the same time I need to be making some kind of movement, writing if I'm in a library, but if I'm at home I may be dancing while I study 'cause I'm very visual-kinesit.
You may ask advisors or teachers to help you find your own style. Good luck.