A common issue in landscape photography is shrunken backgrounds due to using a wide angle lens. This excellent video tutorial will show you a neat technique for fixing the issue in Photoshop.
Coming to you from Brian Matiash, this great video tutorial will show you an interesting technique for bringing a little drama back to landscape images. The idea arises from the issue of perspective when using wide angle lenses, namely that backgrounds tend to get pushed away from the lens and appear smaller. This will not always cause issues, but if you have something like a mountain range in the background, it can takes a bit of the interest out of the resulting image. To get around this, you can use Photoshop's Free Transform tool to enlarge the mountains (or whatever is hiding back there) and bring a bit of dramatic scale back. Of course, you could also achieve this by using a longer focal length, but sometimes, that just is not an option, particularly if it requires you to back up to get a similar framing and geography does not allow it. Check out the video above for the full rundown from Matiash.
And if you really want to dive into landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi."