Grand vistas, details of a plant….shoot whatever you feel compelled to shoot with whatever tools you have on hand. Be creative and try an unexpected composition or an angle other than your regular standing, eye-level perspective.
With the sun low on the horizon, features in a landscape cast long shadows, providing depth and layers. Just before sunrise or just after sunset are also beautiful times. The colors in the landscape will look saturated and moody.
I often put people in a vast shot (a climber on a huge wall or a hiker on a ridge far away) to give context and a sense of size. That being said, it’s also okay to leave the viewer wondering. You can even use it to your advantage and make abstract patterns interesting.