I just finished drafting a new page for the FamilySearch Research Wiki called United States, How to Find Genealogy Records. Rather than reproduce that extensive article, I will let you click on the link and see what kinds of resources are available on the Research Wiki. Even if you have extensive genealogical experience, you might be surprised at the amount of information now in the Research Wiki. I have been writing and editing articles for some years now and I have barely begun to add all of my references and links. But there is an outstanding amount of information already available.