Unfortunately in real life there isn't a tool for absolute perfection, but thankfully in digital form there is! I love to airbrush and re-touch professional photos to make them look their best.
Example 1 - The first photo is one I took of my friend Vicky on a SLR camera. I enhanced the colour, re-touched skin imperfections, smoothed her eye shadow and filled in a gap in her fringe.
Example 2 - The second is a scan of a very damaged photograph, I was asked to bring out what it looked like originally.