Most computers can have their monitors tilted. Whilst having the screen at an exaggerated angle can aggravate neck problems, often only a slight tilt down, or sometimes up, can lessen monitor glare dramatically.
Adjust the brightness of your screen. All modern computers allow you to dim or brighten the monitor at the twist of a dial or the slide of a switch.
Draw the curtains. If you work in a room where the light coming through your window is causing problems, use curtains or blinds to limit the brightness.
Change the screen’s background colour to blue. I’m not sure of the logic behind this one, perhaps because when the colour is darker, the reflection is limited. All I know is that it’s a genuine solution promoted by many computer users - and it works for me.
Buy an Anti-Glare screen for your monitor. These are available from computer retailers and come in standard screen sizes. Most simply attach to the front of your monitor, providing another layer between you and your screen.
Some of these solutions might not suit your working conditions, but hopefully there is one here that will improve your office ergonomics and make using your computer more fun. After all, it doesn’t matter which of these solutions works for you, however it does matter that you find one.