Whenever I edit my photos my paranoia kicks in before I even start retouching. I can spend an hour deciding between photos to edit. It is all down to finding that one photo with perfect body language, or even merging elements from various photos to achieve that goal. I do not care how I get there, all I care about is great creating images with fluid and undisturbed energy flow. There has to be a balance of elements and this is why post processing plays a huge role in my photography.
If you watch my speed art videos in which I edit my portrait photos, you will notice that very often I work in great zoom, 100% - 400%. It is essential for skin editing and making sure that skin pores are not damaged, also it helps a great deal during skin mattifying (micro dodging and burning), which is done almost exclusively on skin pore level. All my portfolio photos are in full resolution at 300dpi, so everything is out in the open. There is a lot you can get away with in resized photos, especially if they are full or half length portraits.
If you are serious about portrait editing you will appreciate its complexity. Whether it is removing distracting elements that ruin the composition, skin editing, global tonal adjustments, color cast and blemish removal, matching skin tones, blending shadow to highlight transitions, adding new complementing elements to the photo via compositing and photoshop manipulation (like drawing hair by hand for instance), contrast and micro contrast adjustments, sharpening, texture repairing, etc., you have to remember that the devil lurks in details so once you take care of all those things that are not visible immediately, all the elements of the photo will start falling in place. And that is why single portrait photo retouching can take between 1.5 to 4h. There are no shortcuts or plugins that can get you there faster and allow for the same level of quality. There is a reason why some of the best things in the world are hand made. Automation is great, but far from perfect.
If nothing else, remember this - portrait photography brings responsibility. As a professional you are responsible for how your model looks on your photos. It is your job to make sure you have done everything that justifies their time or money spent helping you to create images. A great photo can be ruined by poor editing, so if you respect your models you will make sure you have done your absolute best not just during the photoshoot, but also in post processing.
Private photoshop workshops via skype - http://www.ryuurui.com/photo-retouching-lessons.html
Photography workshops in Tokyo: http://www.ryuurui.com/photography-workshops.html
Hire a photographer in Tokyo: http://www.ryuurui.com/hire-a-photographer-in-tokyo.html
Photo blog: http://www.japan-in-photography.com/
For more tutorials and how to videos check out my photoshop and photography tips and tricks YouTube channel: https://www.youtube.com/channel/UCEOVGZ2rpLhR7gSPvaexxxQ