Conventional wisdom says to get your composition right in camera, and while there are plenty of benefits to doing that, the ultra-high resolutions of modern cameras leave us a lot of flexibility in post. Lightroom offers some pretty robust features in the crop tool that many photographers do not take advantage of, and this excellent video tutorial will show you how to use them to improve your images.
Coming to you from Mark Denney, this great video tutorial will show you how to use the crop tool to improve your landscape photos. A lot of us use high-resolution cameras for landscape work, and that allows a lot of latitude to crop in post and still retain a high-quality file. While a lot of people will say you should get it right in camera and there are certainly reasons to do that, sometimes, you might not have the right lens for the composition you want, or a single photo may yield multiple compelling crops of different elements. Check out the video above for the full rundown from Denney.
And if you really want to dive into landscape photography, check out "Photographing The World 1: Landscape Photography and Post-Processing with Elia Locardi."
One thing to remember about the Golden Spiral/Ratio. I was watching something on the subject and in order to use it, the image has to have a crop aspect ratio of 1:1.618. Otherwise it's not truly golden.