I use this target to calibrate my display:
If you want to see the pictures in this blog same as I see them when prepare for publishing, use this target. Left vertical double-bar has to have visually equal densities on the left and on the right halfs. Middle triple bar has to look all monochrome. This is achieved by changing the monitor gamma. Your video driver must have it under advanced settings, color tab. After you are done with gamma, fix the black point (brightness on the monitor) so that on the right-bottom bar you do not see stripes, and on the top-right bar you see them. Voilas!
I choose gamma = 1.8 by three reasons.
Later I might change to 2.2 or 2.5 if I feel right about it.
Andrew Eccles Photography