If your ancestors served in the Military, Fold3 holds a wealth of information for Historical Military Record. You'll be able to document the service of your loved ones and find out more information on their service.  
Genealogy - One Great Family
 One Great Family is the world's largest family tree. Wether you are your looking for your family tree, or conducting more in depth research into your ancestors using their database, One Great Family is a terrific research tool for Genealogists!
Newspapers.Com is a tremendous tool when searching for articles about your ancestors. From marriage and birth records, to obituaries and documents on all life events. This is a superb tool for narrowing down your search!