Get low, and use a wide angle lens to present relationships.
Near/far compositions are easier with WA lenses due to the increased depth of field (shorter focal length, more DOF). You can also exaggerate elements in the photograph with a WA lens - again, near/far compositions. Having a near/far relationship will also introduce a sense of depth into your photographs.
Your best bet is to just play around with a WA lens - either borrow one, or purchase one. Then have at it!