Composition is a subtle and intricate aspect of landscape photography, and there are a few places where it can go wrong. If composition is something you struggle with in your work, this great video details 10 common mistakes and what you can do to correct them.
Coming to you from Chris Sale, this helpful video discusses 10 common composition mistakes in landscape photography and how to fix them. Personally, one mistake that tends to sneak up on me quite a bit is leaving distractions at the end of the frame. For example, this can be something as simple as a tree branch poking into the image or a bright patch of grass. The problem with anything that grabs attention near the end of the frame is that it not only draws attention away from the subject; it also draws the viewer's eye out of the frame entirely. Luckily, it is easily fixed simply by zooming in just a bit or cropping in post if you notice it after the fact. Check out the video above for lots of great advice.
And if you really want to dive into landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi."