The importance of documentation is very important.
I will start with my Kubberness line:
Johann Frederick Theodor Kubbernus his wife Johanna Wilhemina Hamp and their children came to America on the ship the "Trave"
Bertha Caroline Maria
Augusta Sophia Louise
Wihelmina Christina Dorothea
Freda Johanna Caroline Sophia
Carl Frederick Martin Heinrich
They boarded the ship on Sep 1888 and arrived in New York on Sep 21, 1888. They left Lavin, Mecklenburg, Germany for Bremen/Southampton Germany then to England and on to New York.
They settled in Pecatonic, Illinois, my grandfather Frederick William settled in Arlington, South Dakota.
Document where your family came from and how they got to America and their trip here. The voyage and arrival, who was waiting for them if anyone.
Use maps and atlas to locate your ancestor's journey and emigration patterns, the towns they lived in. You can also look up railroad maps it was a major impact on families during their time. The Rand McNally Map Store is a great place to start.