While Photoshop is still the destination of choice for the most involved and detailed edits, Lightroom has evolved into a tremendously versatile and powerful tool that can tackle quite a few images on its own. Three of its most useful tools for landscape photography are texture, clarity, and dehaze, and this excellent video tutorial will show you how they are used and how to leverage them for better images.
Coming to you from Nigel Danson, this great video tutorial will show you the ins and outs of using the texture, clarity, and dehaze tools in Lightroom for editing landscape images. All three of these tools are rather powerful, and it rarely takes much to have the desired effect. As such, it can be quite easy to go a bit overboard, so generally, try to err on the side of doing less with them. One of the best things you can do is simply step away from your computer for a bit after you finish editing a batch of shots. This will allow your eyes time to reset and make it easier to objectively evaluate your work when you come back. 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."