General Genealogy Links - #1 Research Site (pay site)
  Best DNA Tests For Ancestry
   Bureau of Land Management - land records
  Castle Garden - 1st Immigration Center  
   Civil War Official Record

  County Office
   Daughters of American Revolution
  Ellis Island Immigration Center - NY
  Family Search
  Find A Grave
  Library of Congress
  National Archives site
  National Genealogical Society
  Rootsweb - many genealogy tools
  Ship Passenger Lists
  Vital Records (pay site)

Cyndi's list is a comprehensive list of links to genealogical research sites.