As you may know from my profile, I am somewhat colorblind.
I am constantly asking others at home how the colors look before posting.
I try to use a custom white balance and just came across this little beauty
which lets me shoot using other than custom white balance as long as I take a shot of this WhiBal card
in the same light as my subject.
When I open the images in camera raw all I have to do is pull up the image of the card
and use the eyedropper tool to click on the gray area, then set the default for all of the other images shot in that lighting situation.
Here is the link in case you are interested in checking it out. http://www.WhiBal.com