Hi Chris,
Some of the things I do with portraits are:
a) Remove blemishes. (Which it sounds like you're doing with the stamp tool)
b) Smooth the skin. (Although I don't like it when this is overdone)
c) Enhance the eyes. (Make sharper and brighter)
d) Lens Blur the background. (Giving it a more bokeh effect) <<< Not a good idea (see ni@mo's post below)
e) Sharpen the over all image. (I use the manual method of Highkey layer as opposed to unsharp as it gives me greater control, and can be undone, etc).
Not sure if this is the kind of information you're looking for or not.
Cheers
Adza