Be sure to check for a town or county historical society in the area you are researching. Know their hours of operation and their visitor rules.
Final papers are the Petition for Citizenship with supporting affidavits filed by an alien in court.
Birth Records can be difficult to obtain because they can be used for so many purposes. You may be required to provide proof of relationship and proof of the person's death.
DNA Sequencing is a laboratory technique used to determine the exact sequence of bases (A,C,G and T) in a DNA molecule. The technology of DNA sequencing was made faster and less expensive as a part of the Human Genome Project.
Start with yourself. Document everything you know about yourself. Include your spouse, children, grandchildren, etc. Include occupations, where you have lived and all important events in your life. Then, and only then, start working backwards and with your living relatives.