1. choose your state link where you will find state wide resources, news, projects 2. each county has a web of its own - choose the county link
also go to the GenWeb Archives and choose a county. The archives are transcriptions of records that people have transcribed or abstracted and donated for others to use.If the county you are working in is spare, check out all its neighboring county pages as many times a very active site will include records from surrounding areas.
most of the Indiana county histories have been digitized and made available on Google Books. Go there and enter terms like Cass County History and see if your county is there