Visualisation is a very important part of landscape photography. I think you need to be able to see a good image before you can take one. When you arrive at a scene you may know the potential is there for a nice composition but can you see what ingredients are required to make a great photograph? In my latest YouTube video which you can watch here I discuss visualisation in landscape photography, take a look to see me explain how it helped me capture two images that I like. For this article here are a few ideas to get you started on visualising better images:

What does the scene make you feel, is there a story that you want to tell the viewer?
Is the lighting correct for the scene or would it look better at a different time of day?
Could the end photograph look better if captured at a different time of year?
Where do you want to take the photograph from, and which focal length will work best?