If you're looking for a quick and easy way to adjust your monitors without a lot of fussing with multi-step processes the calibration tool at Photo Friday can help you tweak your monitor.
Nothing is a true substitute for hardware calibration but if you're not working in the print industry or as a professional photographer you don't need to calibrate your monitor to the physical world you need to calibrate it so that contrast is correct and you can use the monitor without straining your eyes.
Over at the photography site Photo Friday they have a simple calibration image you can use to adjust the brightness and contrast on your monitor to an optimum level. Visit the link below and follow the simple instructions to tweak your screen.
If you like your calibration tools to have a few more sliders, bells and whistles, check out previously reviewed Online Monitor Test. Have a favourite software or hardware tool for monitor calibration? Let's hear about it in the comments.