The Source: A Guidebook to American Genealogy is a reference book published Ancestry Publishing. When Ancestry published the first edition of The Source in 1984, it quickly became a standard reference in the field of genealogy and family history. That same year, it received the coveted Best Reference€¯ award from the American Library Association. The 1997 edition, built upon the foundations laid down by its predecessor, sold more than 100,000 copies. A poll of librarians placed The Source, sometimes referred to as the genealogists bible€¯ at the top of the Top 10 Genealogy Books€¯ for the wealth of information it offers to beginning and experienced genealogists (Top 10 Genealogy Books€¯ Family Chronicle 3, no. 3 (January/February 1999).
There are great sections on how to research church records, land and tax records, immigration records, military records, etc. We have this book at the FHC. It is also online at www.ancestry.com/wiki/index.php?title=The_Source:_A_Guidebook_to_American_Genealogy. I think this link will work even if you don’t have an Ancestry account.
Take a look at contents of the book at the FHC, or look at the topics online. Pick a topic that you would like to learn more about. For example, Immigration records are not easy to find, so this section would be a good one to look at.