To locate information about your ancestors, here’s some of the most commonly used resources:
Ellis Island Records: http://www.libertyellisfoundation.org/
U.S. Naturalization Records: https://genealogy.uscis.dhs.gov/
U.S. Census Records: https://www.archives.gov/research/census
New England Historic Genealogical Society: https://www.americanancestors.org/index.aspx
Social Security Administration Records: https://secure.ssa.gov/apps9/eFOIA-FEWeb/internet/main.jsp
Military Records: available online at ancestry.com. You must be a member to have access to their database.