that you have a multi-layer document you may discard / fine-tune
all the made corrections to your taste as follows.
This instruction composed for Photoshop 5
to Photoshop 6 version)
Open Layers palette (Window > Show Layers);
as default it is placed in the right-bottom of the screen.
In this sample all changes were made in separate layers; name
of a layer describes type of correction. Original (un-edited)
image saved as background.
If you don't like some changes at all, you can make corresponding
e.g. if you want to turn off Unsharp Mask filter effect, click
on "eye" symbol
upper screenshot »)
If you want to reduce a correction effect: - select layer (e.g.
click on "Skin: Hue/Saturation") - change layer's opacity
with Opacity slider;
(see screenshot »)