I personally use this on CRT monitors, and I adjust the colors in the menu with each color open to what I personally find look the best to me.

http://lcdtech.info/en/tests/dead.pixel.htm

What monitors do you have (exact model numbers) and which one do you want to try calibrating? Generally you need the professional grade CRTs otherwise your options are pretty limited (such as the one suggested by DankEngihn). You will need Windows XP or higher for best results, with older OSes than that you either get a slightly lighter black level or crushed shadows. But a lot of games from pre-XP era actually look just fine with crushed shadows, if not, you can simply turn up brightness to light up the shadow areas but you will get a slightly lighter black level (which is okay if not playing in the dark). Also some games are absurdly dark (Deus Ex,..), some games will refuse color profiles (Half-Life 2,..) and some (especially older, pre-XP) games look better without color profiles.

My personal method of adjusting monitor settings was to take a photo of the computer desk with my DSLR and bring it up on screen. Then I tweaked the R/G/B and contrast until what I saw in front of me matched what was on the screen. Of course, the camera's white balance was also set to the color temperature of the lighting (5600K florescent).

lick the screen until it is calibrated

oeuvre wrote:

lick the screen until it is calibrated

I bet something like that was the first recorded sighting of a moiré pattern.

Put a colorimeter on them (I recommend the i1 Display Pro) and use ArgyllCMS to generate an ICC profile.