This tip isn’t a huge secret but a lot of people don’t care about it. Do you want great landscape photos? Shoot at dawn or dusk. You can have the perfect landscape in front of your camera, best composition ever, but if light sucks, your photos sucks too. You won’t get the best light at 2 pm or 4 pm but only during sunrise and sunset. And of course, you need to be lucky to have everything work out in the scene.
Take a look at this video. You won’t see a single photo taken during other times of day than dusk and dawn.