Interesting discussion, but hyperfocal, double the distance, the lines on lenses, and even DOF preview button are generally outdated for landscapes these days. It is so easy to see the results and adjust focus if necessary that a rule-based approach is likely to do injustice to your subject. Practice and knowing the character and limitations of your lens are much more critical. And speaking of critical, whatever your subject is should be in critical focus, so if you are using the double the distance approach, move back to the point where your foreground subject is twice the distance. :-)
