Composition-people with landmarks
I think it's really going to very by the scene/landmark. Composing with people and the Eiffel Tower is going to be different than a state building, different than Grand Canyon, California Redwoods, city skyline, etc.
I'll through out there that the rule of thirds may serve as a starting point. E.g. one or two people around the 1/3 spot with the landmark to the left or right, or a larger group occupying 2/3 of the photo with the landmark in 1/3. Adjust from there as your vision directs.
+1 on Fog Maker - knowing what you don't want is a big step towards your goal.
If planning a trip, google photos of the local landmarks and think about where you would place people for a good composition. Also, experiment on 'fake' landmarks to test different compositions. E.g. us a tall solo tree or cell phone tower to represent a landmark tower.
Have fun and post some results!
Lyin' Pete used to do this all by touch...