Dear Suraksha,

In order to concentrate on your studies you should not divert your mind.

Choose a peaceful environement. Stay away from your mobile phones, TV and other activities.

Try to give quality time to your studies. You should be determined and self motivated.

You can make your important notes which will help you in revision as well. 

If you want you can join study group as well.

Always keep in mind this is the time when you can make your career. Don't waste it utilize it in good way.

All the Best!!