Inconspicuosity

Contrast motion with a stationary subject.

Catch a cab or get your “signigicant” other to drive you around. Roll down the window and shoot what you see.

Don’t sweat achieving sharp focus. See what happens.  

Look for people at work.

Find ordinary machines and objects, and shoot them as you would a monster.  

Sometimes you don’t need a head or face in shot to create interest.