This is a really old photo technique and works for photo, but not everyday life.. you'll look like you have dirt on the sides of your nose. A new way is to take a matte warm bronzer (don't use brown eye shadow, too muddy) and sweep across the bridge of the nose... where you would put the highlighter. This draws the attention away from the nose onto the eyes. Works in photo and everyday. And looks more real. If you want contour the sides, just do the sides at the bottom of the nose only and then under the tip of the nose. You'll avoid the dirty brown line and gives the illusion of a thinner nose without being so obvious.