As we all know images need to be retouched and colors need to be tweaked. In the traditional darkroom dodging and burning always came in handy and always worked well. I have noticed that while trying to dodge or burn in PS2 the tones get muddy and it often ruins the image. If you use the clone tool instead on a low opacity it works just the same but does not muddy up the image. You can also play with the different blend modes. This is helpful to utilize the tool for all its worth.