Priya Swan, I know how you feel. It's hard to keep your mind on studying. In studying for an examination there is often anxiety which can block your mind. I took tons of examinations before I finally finished law school, so you can imagine. Let me share a couple of tips with you:
1. Take time to relax or meditate for 15 mins or so before you start studying. This way you can clear your mind to study.
2. Get yourself something to drink - whatever your thing is: coffee, tea, water (preferably not booze, it interferes with the thought process).
3. Eat some fruit, cheese, peanuts, and protein to give you energy while you study.
4. Find a quiet place where you are not distracted.
5. Study for short periods of time. Study in no more than 1 hour at a time. Then break for 30 minutes. Give your brain time to absorb the information.
6. Take notes when you are studying, it will keep you active, will reinforce what you learned, and will keep you from distractions.
7. I used to put on the smooth jazz station (low volume). Music without lyrics can help keep you relaxed.
8. Make sure you're in a comfortable position, seat, etc., otherwise you'll be fidgeting.
9. Make note cards during your study for the same reason in number 6; and you can use them later as flash cards to study more.
10. Don't try to cram. It creates more anxiety. We all know when our examinations are, so start a week early, a little at a time.
Hey, I think I might just make a Hub about this :-)
Hope my suggestions help you.