Originally posted by ckiang
Expensive (best) way: Buy a monitor calibration tool like the ColorVision Monitor Spyder ($299 for the CRT version at CP) with software. The thing plugs into your USB port and attaches to your monitor via suction cups, then the software outputs known colour patches to the monitor, and the sypder thingie reads the colour back in for calibration. If you are serious about colour calibration, this is the one to get.
Cheap way: Use the Adobe Gamma utility supplied with Photoshop and calibrate "by eye".
Regards
CK