If you have not discovered Picnick, then check it out. It is a great way to edit your photos. Here is an example of a recent staging that I did.
Notice that the in the first photo I caught myself in the mirror.
But by using Picnik, I was able to not only correct the lighting but also edit out my image in the mirror and the plug-in.
Online photos are so important. Make them count. This is a free service!