Putting the sun in your composition
The best time to capture and putting the sun in your compisiton is after sunrise and before sunset. During these times the sun is so low in the horizon and it emits awesome colors that are sometimes reflected in the clouds and in the foregrounds. A good landscape photographer either starts very early or very late in the afternoon. There is nothing you can get shooting landscape at noon but bland photos. No photoshop skill can improve it.
The sun is a very good subject or background in landscape photography but sometimes not knowing how to meter or where to meter results in dark background, losing the shadows etc. The best thing about digital photography is you can have instant feedback in your live view.
Cape May, NJ
Just keep on shooting, experiment with different exposures and choose the photos you like and move on to shoot another composition.
Technical photo stuff:
1st photo. DSLR camera, 24mm, f/22, ISO 100, 1/15 seconds, no filter, positioned left
2nd photo. DSLR camera, 35mm, f/16, ISO 100, 2 seconds, Lee 06. Grad ND filter, positioned right
3rd photo. DSLR camera, 18mm, f/16, ISO 100, 25 seconds, B+W 110ND filter, positioned center