Google Search Techniques
Search for university librarian LibGuides that pull together high quality freely available resources.
site:edu "LibGuides" intitle:marketing "statistics"
site:edu intitle:census "LibGuides" "tract"
Search U.S. Government websites for statistics on a given topic.
site:gov "statistics" "consumer"
Freely available Government, University, and Association Resources
Commercially Produced - Generally Free - Resources
Research Centers and Think Tanks