While not directly related to making music, this little utility f.lux has been a blessing for me in the studio lately. It automatically changes the colour balance of your screen to be ‘warmer’ at night, which much easier on the eyes. It took me a little getting used to but now I can’t live without it. Free for PC, Mac, Linux and jail-broken iOS.
f.lux makes your computer screen look like the room you’re in, all the time. When the sun sets, it makes your computer look like your indoor lights. In the morning, it makes things look like sunlight again.
Tell f.lux what kind of lighting you have, and where you live. Then forget about it. F.lux will do the rest, automatically.