Make up a study timetable and give yourself a 5 minute break every hour. That means getting up from your computer and walking, stretching, feeding the dog etc.

Well, try to develop the habit of reading. Read books or articles which draw your attention. Gradually you will develop a liking towards reading. Then you can move on to your syllabus books. Hope this helps you.

I agree with Kosera.

Turn off your pc and throw out of the window:)