How can people concentrate better when studying?

Before you start studying anything, please remember the following guidelines:

1. If you want to study effectively then find a suitable studying environment like a library.
2. Please collect your revision materials before you start studying.
3. Search a good study partner who also focuses on a study and does the same task.
4. Eats good snacks like fruits and drink water.
5. Take short brakes between studying time because of this time for relaxing. Take 10 or 15 minutes brakes.
6. If possible then sit down and study your material
7. Do your revision very well before the exam.
8. Do not think negative points of the exam, but always be positive.
9. If possible then not use a computer and mobile phone when you studying. Also off your TV.
10. Do not listen to music when you studying.
11. Do not think very about off-topic.
12. Set your goals of life and do not get discouraged. If possible then do self-motivated.