Think way back when you got your first camera. Not all of those shots of Aunt Sue turned out correctly. I am sure that Uncle Bob was not left out either. A lot has transpired from the days of analogue film. The advent of digital has allowed us to instantly check on our image on the display LCD of the camera. A lot of photographers delete the bad image and make a few adjustments to their camera and carry on. Are they right in their workflow technique or are they missing a good learning opportunity. Digital storage is cheap these days and it is affordable to keep these images as a critical learning step in your post processing technique and review. Quite often that shot is not as bad as you though and you may have made a rash judgement when rushing to delete it. A bad image can often be viewed as a challenge in your beliefs about digital technology and your editing techniques. In our thumbnail example we see a black image or do we?

By carefully adjusting exposure, shadow recovery, whites and blacks we can pull a usable image out of what we thought was a lost cause. By further adjusting the saturation, blacks, contrast and clarity we can render the image as a soft romantic black and white look.

Here are the Lightroom adjustments made to the image. 

Then finally a crop adjustment to remove the negative space in the image.