A great article! Thanks.
But since many of our users are too he-man to appreciate fecund landscape techniques, there's really only two rules:
1: Think like a magazine art editor: Don't stand back a whole mile and try to put the entire universe in your view.
2: Think like a Host: Make sure they can see the front door of whatever prison it is that you are designing so that some hope remains.
Dwight Atkinson