Sometimes I do up the contrast in Photoshop, but in this one I actually only cropped it. The water was this blue and deep in the real photo.
Two things contributed to the deep blue of the water:
1. I bracket all my photos with a camera preset that takes three photos every time I push the button. The camera takes a mid-exposure, high-exposure, and low-exposure. This one happened to be the low-exposure shot that kept the colors so dark.
2. I took the photo in the morning with the sun directly at my back. This allows the colors to have maximum depth. That's one of the reasons I was so pumped about the CMC route is that with the orientation of the mountain, I knew the sun would be a my back nearly the whole time. So the colors would be deep and rich, and the photos awesome.
3. One more third option I can mention is that using a circular polarizer really helps reduce the haze and reflection of the sky and water in photos. In this case I wasn't using one, but I usually do to get dark, rich sky colors.
I don't have a sunset setting, although I'm sure it would be handy. Concerning the circular polarizer, it's a lens filter that will fit on any DSLR lens. All you have to know is the lens diameter, which is usually printed on the side of the lens (i.e. 58mm, 77mm) The best ones are Hoya, but they are pricey ($170). Here's a link:http://www.hoyafilter.com/products/hoya/gf-04.html