Vintage Postcards - Do a Google search for vintage postcards from your county. Many can be found, particularly on online auction sites where postcards are often posted for sale.
Google Books - Google Books contains many historical books for various counties. Biographies, geographical and historical information, etc. can be found and copied to our sites.
Public Library websites - See the Research links page for information and do a Google search as well. Lots of libraries have historical and genealogical information on their websites.
Facebook and other social media - Some counties have had tremendous luck using Facebook to connect with researchers and others interested in county history and genealogy.