Nice overall lighting and composition. I'd initially stay away from the tone mapping programs/plug-ins, which is what I'm guessing you used to process these. When processing a landscape photo, generally I'm going to adjust the white/black points on the histogram as necessary; then adjust white balance, contrast, exposure (which really should be nailed already), saturation, vibrance and clarity as necessary in either ACR or Lightroom to get an overall good look to the photograph. I'll also apply some input sharpening. . .nothing too drastic at this point, though.
From here, I bring it into Photoshop, and really start looking at the individual elements of the photograph. The big areas I isolate are the sky, land and water, as these will often require slightly different processing to get the look I want. Most of my work is with tone curves, using masking layers on the adjustment layers to isolate the areas I want to affect. Next, I really look at where I want the viewer's attention to be drawn. Sometimes the natural lighting is absolutely perfect, but usually not, so I will lighten and darken areas as required. In general, the changes should be pretty subtle. You want to change the photo without it looking like you've changed the photo. I could use the dodge and burn brush, but I find it easier to use adjustment layers and masks.
The last step (usually) for me is applying some light sharpening, expecting to apply some additional output sharpening if I end up sending it off to the printer. Some people will only do this sharpening once they're ready to either publish to a webpage, print the photo, etc. I'll always save the PSD with layers intact, so when I decide a week later that I want to make just one or two little tweaks, it's easy to do.
Hope that helps. There's obviously no one answer. It takes a lot of practice to really perfect a technique. I'd definitely look for books on the subject, plus there are tons of videos and other explanations of techniques you can find online.
