Most landscape photographs require at least some degree of post-processing to produce a complete image, and as such, you need to be comfortable with your skills not only behind the camera but at the computer as well. If you are working on improving your landscape image edits, check out this excellent video tutorial that discusses four mistakes photographers make in the post-processing stage and how to fix or avoid them.
Coming to you from Photo Tom, this great video tutorial discusses four mistakes landscape photographers make when editing their images and how to fix or avoid them. By far, the most common mistake I see (and one that I have been guilty of plenty) is simply taking an edit too far, most often with regards to color. There is a fine line between vibrant and gaudy, and it can be easy to lose track of this in the editing process simply because we spend a lot of time with an image and lose a bit of that objective perspective. The easiest way to combat this is with a short break between editing and exporting simply to allow your eyes a chance to reset. You'll often find yourself dialing things back a bit after that second look. Check out the video above for the full rundown.
If you want to continue to learn about editing landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi."