I love this quick 2-page document of public library statistics that OCLC put out: How Libraries Stack Up 2010. My library could definitely benefit from putting out a short, colorful document like this - for administrators, for the Board of Trustees, etc. Even if we only used it to compare ourselves to past statistics or made general comments in relation to number of students on campus.
For example, last year our stats showed that there were nearly 160,000 visitors to the library. If I estimate the campus population at 2000 (it's somewhere around there), that's basically like saying everyone visited the library 80 times.