An adjustable chair can also help. But remember, lowering your chair too far may put your shoulders and arms in a bad position. Your shoulders should be relaxed and your elbows should be bent no further than 90 degrees. Having your keyboard on a pullout shelf lower than your desk top will help. When using a monitor, be sure it as positioned so that you can see it with your head held straight - not looking up or leaning forward.
Proper lighting is important as well.
When working on a keyboard, your wrists should be straight or slightly back. A wrist support may be useful. Avoid twisting your neck to look to the side or behind you, turn your chair instead. Avoid cradling the phone between your shoulder and your neck. Ten Tips for Mental Health Build Confidence - identity your abilities and weaknesses together, accept them, build on them and do the best with what you have.