F.lux = awesomeness. Relief for eye strain caused by computer monitors!
Trust me, you don't want to go back.
What f.lux does is that it changes the temperature of your monitor colors. By warming up your monitor colors after sunset (as measured from the location you give it), the program supposedly helps you fall asleep better. I can't confirm that, as I still stay up way too late just about every night, but what I can tell is that my eyes haven't got strained due to my monitors in a long long time.
Of course, that could be attributed to tons of other factors like me re-positioning my computer desk and things like that, but I'm positive it's because of this.
What I like about f.lux also is that you don't really notice it even being there after you've set it up and got used to it -- unless you turn it off, that is. After ten minutes of using the thing at night, try turning it off just to see the difference. You'll be quick to turn it back on.
Occasionally it seems to do something weird after I boot up to Windows (8) but other than that, it just is there. (By weird I mean setting itself to max "warmth" and then slowly cooling to what it's supposed to be)
Try it, it's free. http://justgetflux.com/