One of the problems that we bloggers encounter on a daily basis is how to edit photos that are dark, have poor contrast and horrible skin tones. Most photo wire services usually don't color correct photos for copyright and journalistic reasons. So it's left up to the individual blogger to color correct our own photos -- which most bloggers don't know how to do.
A quick Google search yields thousands of websites offering tips on color correcting your photos. But most of the tips are tedious and too complicated for the casual user to understand.