Tip #2. Play with motion.
Clouds move, water moves. Try to create dynamics in your frame by the use of moving water or clouds. You can do this by using long or short shutter speeds. You can make use of filters to create longer exposures or create drama with very short exposures. Always experiment with different exposure times with both clouds and water.
Tip #3. Experiment with a CPL filter.
I did landscape photography without a CPL filter for years. But once you have one, you start to see why it can be so useful in different cases. It can be especially useful to control the amount of sunlight and reflection on reflective surfaces — you can’t simply do this in post-production.