In previous posts we've discussed emphasizing ridgelines, linework, and property boundaries.
Suppose you want to emphasize a point set. Here's a fun way by converting the points into spheres (click for high res version):
The points are raised above ground based on an attribute value. A couple of tricks help them stand out. For one, there's a nice specular reflection to help define it as a 3d object. Also, the spheres cast a shadow that helps highlight their position above ground level.
Here's a close up view (click for high res version):