Decide on where to place the horizon
Many beginners simply point the camera at the part of the scene that inspires them the most. While there’s certainly nothing wrong with photographing what inspires you, make your composition a little more deliberate. Instead of just shooting, think about where to place the horizon in the frame, instead of automatically putting it dead center. What’s the most interesting part of the scene? If it’s the landscape, try putting the horizon on the upper third. If it’s the sky, try placing the horizon on the lower third to capture more of the sky in the shot.