While you will want to capture the standard, beautiful waterfalls shots, look for ways to vary your compositions. One way to do this is to place the main falls in the background of your image. This of course requires that an interesting foreground subject be found. The main falls in this example are the 13' Oneida Falls in Ricketts Glen State Park.
As with a significant percentage of my landscape images, a high quality B+W MRC CP filter was used for this picture. You also need to know that this is an HDR image. The background falls were in stronger light, so images with three different exposures were captured and overlayed in Photoshop. Parts of the brighter upper layers were erased (very soft brush setting) to allow the darker images to show through. This easy process yields a natural-appearing image.