Placing foreground elements within you shot not only create depth in a photograph, it is an excellent way to frame your subject.
This shot here was done for a hospital client in their lab. By placing beakers and other glassware on a cart in front of the lens, allowed me to frame my subject easily by moving the glassware for a pleasant composition. I lit the lab technition using a softbox from the left, I used a grid with a full CTB gel, this is where the blue cast is coming from on her left side of her head.
Using the backs and shoulders of other in a photo is another good way to frame you intended subject. I was shooting for a Real Estate developer who operates hundreds of apartment complexes around the country. I took one of their sales persons outside on an overcast day and put together this composition using an on sight maintenance person and another sales person as perspective renters.
I used a Nikon SB-800 on a stand pumped through a small octobox to the subjects right (camera left) a fill card was used to bounce fill into the shadow side of the face.
Here are a few more examples applying the same techniques as above. Using foreground elements really help to draw the viewers eye where you want them to go. The only lighting added to the UPS photo below was a fill card held by my assistant to the left of the frame just out of sight. The fill card bounces sunlight back into the subjects opening the shadow side of the face.
The last photo was shot for an oil & gas client in their drafting department. Once again by use of a foreground element depth and framing directs the viewers eye to what is important...Your subject.
I've been shooting for Fortune 500 companies for over 24 years specializing in annual report work. I love this type of work, I never know whats going to handed to me in the way of subjects or weather. Be sure to visit my website to view additional work.