I mentioned at the start that I'd made a couple of other slight alterations to the picture to reduce ageing effects, but these don't use the Healing Brush.
As we get older, the cartilage in our nose gets thicker and harder, making the nose larger. The effect is more noticeable in men than in women, but even so a tiny reduction in the size of the nose can make a person look several years younger.
To achieve this in our portrait shot, I used the Polygon Lasso tool with the Feather set to 20 pixels to select a roughly triangular area around the nose including the bridge of the nose and the immediately surrounding area. I then used Ctrl-C and Ctrl-V to copy and paste this selection as a new layer. Photoshop automatically places the new layer exactly over the area from which it was copied, so there's no need to reposition it in this case.
I then selected Free Transform from the Edit menu, with the keyboard shortcut Ctrl-T. This allows the layer to be rotated, skewed or to have its scale changed. In the tool options at the top of the page you'll see the X and Y dimensions at 100 percent. Between them is a button with a chain on it. Clicking this links the two dimensions so that any change to one also changes the other, maintaining the aspect ratio of the layer.
Only a tiny change in scale is needed to achieve the desired effect, so change either the X or Y scale to 97 percent, then hit Return twice to confirm the change. You can then merge the layer back into the background.