I chanced upon this monitor testing site that is worthy of sharing.
If you care about your images, you need to care about the condition of your monitor (s). Monitor quality factors like: Contrast, display settings, clock and phase, sharpness, gamma, black level, white saturation, gradient, inversion, response time, viewing angle, contrast ration, and subpixel layout. It sounds a whole lot of scary! The good news is, monitor calibration is fairly easy.
Here are LCD monitor test pages that will help you judge and correct the image quality seen on your monitor. Follow the step by step instructions provided by Lagom and you'll be closer to getting the most out of your LCD monitor.
http://www.lagom.nl/lcd-test/