Before and After
2. Use color to add an additional degree of contrast
Color adjustments using curves can be used to bring out contrasting colors in your photo, adding an additional degree of contrast.
4. Add a touch of color with curves
Use curves to adjust the colors of your photos. Free post-editing actions and scripts are available for download in the scripts/actions section of JFotography to help you learn how to use curves.
5. Clone and heal if necessary
Use the clone and heal tools sparingly to tuck in that shirt, fix up that hair, or remove that small piece of over-exposure in the background. Minimize your use to minimize the chances of a Photoshop disaster or the fake-over-processed look.
More before and after post-editing comparisons
For more post-editing comparisons from JFotography, check out JFotography's Facebook page. You can learn a lot about post-editing just by observing how others post-edit and how a photo may be enhanced through post-editing. So consult a search engine to find more examples.