Find out what is missing
After you have assembled all your records, step back and take a critical look at it. Is your current generation well documented; if your answer is yes, then look at the information on your parents. Do you have their vital records [birth, marriage, death]? Try to cite these from original documents. Then take a critical look at their records. Are they well represented? If the answer is yes, then move on to your grandparents.
Remember as you go backwards everything doubles, two grandparents, four great-grandparents, etc. do not spread yourself to thin. Focus on one surname at a time.
As you get farther back you may run into immigration records. Do you know when they arrived in the United States? Where? Were they naturalized citizens?
Choose, Search, and use the available Records
Genealogical Sites
Biography Assistant
Social Security Records
Social Security Administration "Death Records" reported 1937-1990
Commercial site; both free and pay database
Family History Library [FHL] - [LDS]
Ancestral File [Family Tree Maker Database]
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