The Ancestry.com Wiki is made up of four kinds of fantastic content: The Source: A Guidebook to American Genealogy; Red Book: American State, County, and Town Sources; Other great Ancestry.com content; Content added by you.
Article by Thomas L. Clough. The idea of researching all the thousands of ancestors you have can seem very intimidating. If you take them one branch at a time though, the task becomes much more manageable.
See also the PDF version (http://www.thinkgenealogy.com/wp-content/uploads/Genealogy%20Research%20Map%20v2.pdf) and the zoom-able version (http://www.thinkgenealogy.com/2011/03/04/zoom-able-genealogy-research-process-map/)