State Specific Sites: http://www.preservingtime.org/state-specific.html
Military Records:  http://www.preservingtime.org/military-records.html

General United States Sites:

• US Gen Web--  http://usgenweb.org/ Provides information about each state and its resources with links to its county pages and archives.
• Link to state archives in all 50 states:  http://www.statearchives.us/

• Access Genealogy--  http://www.accessgenealogy.com/

Website known for its Native American Research information; Information and links for all 50 States as well.

• ($) American Ancestors (New England Historic Genealogical Society)--  http://www.americanancestors.org/home.html
• Bureau of Land Management-- http://glorecords.blm.gov/
• ($) Fold 3- (Formerly Footnote)--  http://www.footnote.com/   Available at LDS FamilySearch Centers. 
• Genealogy Inc.-- http://www.genealogyinc.com/  Lots of how-to documents and research strategy information along with links to information organized by state.
• Genealogy Trails-- http://www.genealogytrails.com/
• Library of Congress-- http://www.loc.gov/index.html  Harder site to navigate, but a real goldmine and worth the effort.
• National Archives (NARA)--  http://www.archives.gov/  Harder site to navigate, but a real goldmine and worth the effort.

1. NARA Link to state archives:  http://www.archives.gov/research/alic/reference/state-archives.html

• Paper Trail--  http://www.paper-trail.org/  (19th Century migration on the overland trails; search for free, subscription to receive reports; Available at LDS FamilySearch Centers. )
• Search Systems-- http://publicrecords.searchsystems.net/ (Guide to free public records)
• Social Security Applications (order online)-- https://secure.ssa.gov/apps9/eFOIA-FEWeb/internet/main.jsp
• ​Vitalrec-- http://vitalrec.com/  the most comprehensive resource for locating vital records United States Birth Certificates, Death Records & Marriage Licenses (locate and order-- not usually available for free or online)