A successful landscape photograph takes the confluence of multiple factors, and because you are dependent on multiple factors, it can be easy for just one to go wrong and derail the entire shoot. It is common to overlook that phenomenon and to be left stuck, and this excellent video essay discusses what you can do to ensure you still come home with a worthwhile image.
Coming to you from Landscape Photography iQ with Tom Mackie, this great video essay discusses the importance of having alternate plans in landscape photography. Landscape photography can be a rather unique genre, as you can do everything right, but still be foiled by weather that just refuses to cooperate. That being said, I firmly believe you can make good landscape images in any light; the key is making photos that the light and conditions are conducive to, rather than digging your heels in and trying to force the original shot into existence, which often results in a lot of frustration and mediocre results. Check out the video above for the full rundown from Mackie.
And if you really want to dive into landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi."