I took a class, Composition-On-Location: Princeton University, via the Princeton Digital Photo Workshop group. The class was led by Alan Kesselhaut and Bob Mulholland. Alan spent some talking about the basics of composition before we started a slow walk around the Princeton University campus. Both instructors were willing to answer questions while also giving guidance on how to approach some of the subject matter -- mostly buildings -- we encountered.
Of all the shots that I took, this one of the Woodrow Wilson School of Public and International Affairs was my favourite. I took it while walking back up Washington Road. The class was over and I want on my way back to my car.