Family History for Beginners by Ancestry

Tracing Your Ancestors Through the Census Records.
Once you’ve found your ancestors in the 1930 census, you’ll want to trace them back through the other census years as well. Learn the differences between each census, from 1790 to 1920, so you know what to expect and can make your search even more successful.

If you want to read more about this, here is the link for Ancestry.com. http://email.ancestry.com/cgi-bin13/DM/y/h4GV0QRIUB0G310vJz0GY

I have done this with my relatives and it helps not only to trace a specific person, but also to find out who there children and parents are. Sometimes by looking at their neighbors you will be able to find more family members.

I hope this helps