I just discovered this: that the screen of the laptop can stay on any angle you want. Of course I have known this ever since I saw a laptop for the first time; but until yesterday, I found its importance. Before, I used to have the screen at about 90 degrees' place. Because my chair cannot change height, I have to sit rather low in order to have a better view on the screen, which is quite suffering. However, yesterday when I turned the screen to a larger angle (say 100 degrees) and found that I can now sit straight up, very comfortably! I cannot believe that it took me six month to discover this obvious little tip. :) Since half of the time I stay at home I will be sitting in front of my laptop, I am really happy to change my sitting style and make myself comfort.