FamilySearch’s Online Genealogy Records by Location is a comprehensive list of records organized by country and state (U.S.). When you click on a state a new page is displayed providing links to a broad range of record sources including governmental, educational and commercial record sets. Note that commercial records are identified with ($) after their title. Each page also offers links to related research topics.
Once you have entered everything you know or can easily find out about your family, you may start asking what is next? Where do you go from here? If you have entered your family information into one of the large, online family history programs, you may have already gotten some hints concerning documents that might add addition information and in some cases, additional people to your burgening family tree.