One of the most challenging aspects of landscape photography is composition, as unlike most other genres, you do not get any control over the elements in the scene, only where you place your camera and how you frame them. If you are looking to improve your compositions, check out this great video tutorial that will show an interesting challenge as well as some useful tips.
Coming to you from Nigel Danson, this interesting video tutorial will show you a challenge to help you work on your landscape photo compositions. One thing I really like about Danson's approach in this video is that once you exhaust your standard wide angle options, you will likely start to explore using a telephoto lens. I think longer focal lengths are criminally underutilized in landscape photography, and they can open up an entirely new compositional palette that allows you to isolate and emphasize a single interesting element or create more abstract images of an otherwise familiar scene. Check out the video above for the full rundown from Danson.
And if you really want to dive into landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi," which is currently on sale along with the rest of the Fstoppers store.