Triangulation (Hierarchy) - Creating dynamism in images by creating triangles and emphasis.
Negative Space (White Space) - Making the space between objects interesting to look at.
Minor White's Rule of Thirds - Dividing images into thirds and placing objects on grid lines.
Here are some sketches we drew to work from:


Here are some of the compositions we shot:
Daniel
Marianna
Cristina
We also focused on using lighting to create a sense of mood or emotion:
Indiana
Cristina
Indiana took some beautiful close-ups: