Some desks do adjust in height, so look to see if there is such an adjustment. Much modular office furniture (i. e. cubicles) allows for adjustment of work surface height, as well, although making this adjustment may require some work. Ask your employer or facilities department to help you adjust such a desk.
Consider split-design or tented-and-raised keyboard; otherwise, simply try to select one which is the right size for your hands. To help your wrists “float” over the keyboard, use a wrist rest; however, only use it if it actually elevates your wrists; depending on your position, this might actually encourage you to hold your hands at a bad angle. Many keyboards have tabs to raise the back, but check your wrist position before you use them. You may need to raise the front, instead. If your keyboard has no such adjustment, try propping up the front on a paint stick, a couple of erasers, or other such object.
Sit upright. Keep your torso roughly vertical, your thighs horizontal, and your lower legs vertical. Sit reclined. Tilt the backrest of your chair back so that your torso reclines between 105 and 120 degrees from your thighs. Sit declined. Tilt the seat pan of your chair slightly so that the angle between your thighs and torso is slightly more than 90 degrees. Don’t overdo this or you will feel like you’re sliding.
Consider getting a dedicated pair of glasses for computer work.
If you need the text larger to see, learn how to adjust the font and zoom in and out, without decreasing the resolution.
Keyboard trays can lower the keyboard and mouse, and help keep them within easy reach. Good ones allow you to adjust the position and angle, as well. Consider a keyboard tray, especially if you are shorter.
Choose a mouse which is the right size for your hands. Don’t rule out “portable” mice (if your hands are smaller) or “gaming” mice if your hands are larger. Try to find a shop where you can try out a variety of mice. Adjust the mouse drivers in software, if you wish to change the speed of the cursor movement relative to the mouse movement. Adjust it so it feels right for you.
If you use a document holder, do not place it to one side of your monitor (unless you also use a second one on the other side); turning your head in one direction for prolonged periods fatigues the neck muscles. Instead, position the document holder directly beneath the monitor, angling it between the monitor and keyboard. If you touch type and do a lot of transcription, consider placing the document holder in front of you, with the screen to one side. The main focus of attention is then straight ahead with occasional movements to view the screen. Another option would be to provide a lectern that is positioned between the keyboard and screen.
