The expression “patience is a virtue” is clearly evident in doing landscape photography. I often find that the difference between a pleasing image and a powerful image is simply waiting for the light to add drama to the scene. It could be taking the time to allow a cloud to create interesting patterns or shadows as it passes overhead, or waiting for the sun to drop behind a rock to highlight a feature in the scene you are capturing.
Just look at the difference between the image below, and the image above. Though taken just a couple of minutes apart, a cloud passing overhead creates more focus on the rocks in the image above, and makes for a more impactful image.
For more detailed information and additional examples from this shoot, and other tips on how to improve your photography, visit Allen's photoblog at A Better Photograph.com.