Proper posture when using a computer keyboard is very important and can make a difference to the way you feel after working on a computer. Start by making sure that you have a decent chair while on the computer. It should be adjustable in height and have an adjustable backrest. Make sure that your feet are flat on the floor or use a footrest for your feet. Your computer screen should be
. adjustable also so that it is about 15 degrees below your eye level. Information, along with images can be found at http://hubpages.com/hub/Proper_Posture_for_Computer_Use