My problem is that I go into photoshop and I just "do things." I really don't know exactly what I should be looking for, or how much twiddling is too much. Often, when I make my photo look "interesting," I get blasted for having too heavy of a hand, or relying on filters, etc. Other tools are just way complicated.
I respond best to logical, categorized explanations.
Any book/class/online tutorial suggestions for post processing do's & don'ts?