1. Use long exposures to shoot water or best waterfalls in the fall scenery. Use a small aperture (such as F/11 to F/22, remembering apertures are a fraction), Low ISO, polarizing filter and then a slow shutter speed (variable - you will need to test the results and adapt) to soften the water.
2. Use long zoom lenses to isolate the leaves and the colors. Use a tripod to stabilize. If windy, remove lens hood to help.
3. Shallow Depth of Field will help isolate your subject.
4. Move your camera: while panning, racking focus, zooming in or out and during longer exposures.
5. Look at reflections to double the bang!
6. Shoot low and wide to get the whole picture of the moment.

See my blog for more pictures.