From Digital Photography School, 11 must-dos for better landscape photos. Here’s a sample:
Maximize your Depth of Field
While there may be times that you want to get a little more creative and experiment with narrow depth of fields in your Landscape Photography – the normal approach is to ensure that as much of your scene is in focus as possible. The simplest way to do this is to choose a small Aperture setting (a large number) as the smaller your aperture the greater the depth of field in your shots.
Think about Horizons**
It’s an old tip but a good one – before you take a landscape shot always consider the horizon on two fronts.
* Is it straight? – while you can always straighten images later in post production it’s easier if you get it right in camera.
* Where is it compositionally? – a compositionally natural spot for a horizon is on one of the thirds lines in an image (either the top third or the bottom one) rather than completely in the middle. Of course rules are meant to be broken – but I find that unless it’s a very striking image that the rule of thirds usually works here.