How to CONCENTRATE?

When you have to do something seriously, like studying before exam, your work that is due tomorrow, you just have to do the task, How would you concentrate and get the work done?
If you do in your room, there is a lot of temptation that distract your concentration today, computers, video game... what makes me really off concentrate most is computer.
Anyway, here I sum up how I concentrate more effectively & with stability.

1. The best way you can concentrate is to create the environment that you only can study, eliminate temptations like computers.
The easiest way to do this is to go to library or cafe. But I prefer libraries because it is quiet while cafe could be noisy and costly, and desk is not spacious.

2. Get sugar
without sugar, your brain does not work, but be careful!! too much sugar will make you sleepy, 1 piece of chocolate is enough. or have a coffee or tea.

3. Move your body
if you succeeded in studying for some amount of time, but have to continue, but your body is a little tired, move your body to refresh. a little sport like walking or exercises is great. even just standing from chair and take a little walk in house is good. or taking shower is also good refreshment.

4. Other refreshment
Listen to Classic music, smell something, do something completely opposite, give a little pain to you, put something blue in your room, eat cheese,

Lastly, for me, wearing a hat is also effective. I think this is only effective to me, so everybody must have some kind of your-way, so finding that is also important.