Not processing an image
It’s rare that a JPEG image straight out of the camera requires no subsequent work. To get an image looking its best, you may need to tweak the levels, fix a colour cast, add some additional sharpening or crop it for a better composition. If you shoot RAW files then you have to process the images yourself, which adds time to your workflow, but at least you’ll be starting with the highest-quality file that your camera can produce, and any changes that you make are never permanently applied to the original image.