Idea I Angle manipulation: Angles are a very great consideration in taking unique photos in great background.
Of course, standing on that log above murky waters does not seem like an ideal situation and I don't even know what tree the photographer was on. An easier solution to trying out new angles and utilizing stairs as a starting point and then graduating to climbing trees.
You may not see the full faces of the people in these pictures, but it gives you the advantage of capturing an intimate moment and still keeping it private.
Idea II Unique locations: Simple enough, but it seems like quite the adventure to find the location and timing.
I mean how often do you really find abandon piano and rusted cars in the the middle of some mystic scenery? Luckily enough I live around some corn fields and winter brews around quite frequently and heavily where I live, so it takes care of lighting and unique atmosphere.
Some objects that I would consider would be mementos from prior dates and common hobbies. The background in these types of photos seem pretty basic, but the result is pretty effective!