Adjust your chair. Adjust the height of a chair so that you use the keyboard with your wrists and forearms straight and level with the floor, this can prevent repetitive strain injuries.
Support your back. Reduce the risk of back pain by adjusting your chair so your lower back is properly supported.
Rest your feet on the floor. Don’t cross your legs as this may contribute to posture-related problems.
Place your screen at eye level. A good guide is to place the monitor about an arm’s length away, with the top of the screen roughly at eye level.
Have your keyboard straight in front of you. Leave a gap about 4-6 inches (100 mm – 150 mm) at the front of the desk to rest your wrist between bouts of typing.
Make objects easy to reach. Position frequently used objects, such as landline telephone or stapler within easy reach. Avoid repeatedly stretching or twisting to reach for things.
Take regular breaks. Make sure you change your posture as often as is practicable. Frequent short breaks are better for the back than few long ones.