If you click on one of the selective tools you will see the basic adjustment panel. My favorite tools are the graduated filter, the radial filter and the adjustment brush. Depending on the areas you would like to adjust, select the appropriate tool.
In the photo to the right, the basic adjustments of exposure, contrast, vibrance and saturation have been made. There needs to be more detail and drama to the sky, and this can be done by using the graduated adjustment tool. If you would like to increase or decrease exposure in a particular area, use the radial filter, and to fine tune smaller areas, use the adjustment brush.