You have to analyze the shot before you begin doing work in post. Figure out what needs to be done. Figure out what you want to do that doesn't necessarily need to be done. Determine if you have the skills for the techniques involved.
One trick (not really so much of a trick.. perhaps just a tip) is to work at high magnification and smaller, soft brushes. Many times people go in with big brushes, and big brushes can really make a mess by either adding a whole lot of mush or showing a defined edge on the cloned sample. Work very slowly and zoom out often.
Always work with copies of layers and with adjustment layers, taking snapshots often to maintain the highest degree of nondestructive editing possible.... and don't forget about your history brush.

i'm not very good at the processing part at all, i know what i like i, just can't get there
luckily, i have a good friend who can process images just the way i like them to look


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