Use a tripod
By using a tripod images are made sharper and clearer by reducing vibration and shake from human hands. Use a good quality tripod and If it’s windy try adding ballast weight to the bottom such as a backpack to stabilise it.
Graduated ND filters
When shooting landscape photos we usually have an equal amount of sky to ground. Cameras struggle to expose both correctly at the same time and your sky can become blown out. Using a graduated Neutral density filter will restore shadows in your skies. Think of it as sunglasses for your camera.
Shooting with a wide angle lens allows you to fit more of the beautiful view into the photo. Focal lengths between 12mm and 35mm are ideal for landscape photography. If using a compact camera just stay zoomed out as much as you can.
Panoramas are great for fitting in the vast landscape found in places like mountains. Most compact cameras and even mobile phones have the feature built in but it has been hard with DSLR cameras involving skill in photoshop until now. Lightroom has just added an automatic panorama feature for 2017!
These are great for removing unwanted reflections from glass, water or snow. Be careful with them for landscape photography though as they can remove those beautiful artist reflections from places such as lakes.
Be careful about shooting straight into the sun. It can be used for artistic effect but be aware it will affect the dynamic range of your camera even with a neutral density filter.
When combined with a tripod a low shutter speed can capture motion beautifully such as flowing river water and moving clouds. During the day it must be accompanied by a Neutral density filter to restrict the light entering the sensor. Try and ND8 filter and a 2 second shutter to start with.