Baxter'smybaby,
I like a lot of what you have going on in this image. I like how the river leads you all the way through the frame and I like how the background hill is slightly hazey, giving a good sense of depth to the shot.
One thing that would help this out is having something interesting in the fore-ground, like a tree-trunk/branches or a large rock. It would give a better sense of scale to the shot and would break up the expanse of river that uses the bottom half of the frame.
Also, because this was shot (from the looks of it) was taken around mid-day, it's got cooler colours. A bit later in the afternoon/evening or earlier in the morning would give the light some warmth.
I'm not sure what camera gear you're using, but if it's an SLR, a polarizer (while it would cut through the haze I mentioned before) would help the colour in the sky by making the blue a deeper, richer colour.
Overall, a good shot.