Sunrise and sunset images are usually compelling on their own, but adding a perfect copy of that scene reflected in a body of water takes it to the next level. When using a polarizer to enhance the sky, the best angle is 90 degrees to the sun’s path; however, when used to enhance and even out reflections in the water against the brightness of the sky, a polarizer works well in all directions.
For best results, level your camera for even reflections. Some newer cameras have built-in levels (like in an airplane), but although these are cool features, they can be difficult to operate in low light and eat up valuable time while the light’s vanishing. A hot shoe bubble level can be helpful for this reason because it’s always on.