You are at a great location, you have your camera setup and a perfect composition through the view finder. What will turn a good image into a great one? Light…. it is why landscape photographers get up before the sun rises and make long treks early in the morning. It is why they spend hours at mid-day scouting for locations to use for morning or evening. It is why they walk back from an evening location for hours with a headlamp on.
You can use light to highlight elements within a scene such as this.
You can use light to light up the clouds in the evening.
On an overcast day you can use light in a scene so everything is lit more evenly.
But it is all about light. Next time you go out looking for that great shot, think about how light will affect it. Think about shadows, highlights, reflections… use it to your advantage. Most of all, be patient. Light changes, you need to be there when it does.