Learning is much like sports- to win, you have to keep yourself in a perfect form.
Remember that you need to pay attention to your BODY- it is a machine- keep it balanced. Too much of anything is bad for you.
Thats it. This is a blue print for success in exams.
I will elabotare on each of above.
Only after you understand the importance of above & follow them, that you will be ready for more COOL methods to learn better.