A general background illumination is important to avoid the hard light to dark contrast if only a desk lamp is used. Indirect wall washers, a floor lamp or an uplighter will do nicely. For the desk lamp look for one which is adjustable for height and will reach over the area where you are working. It is most important to avoid working in shadows.
If you have a computer, try and light the wall behind it to avoid tiring your eyes when looking at the screen. Make sure the lights in the room do not reflect off the screen into your eyes.
