Use a good genealogical software package to maintain your records and your digital files.
Use holidays and family gatherings to relate stories to the next generations. Christmas and Thanksgiving are great holidays for this to happen.
Prepare a census timeline before you begin. Review what you will find in the census you are searching. Work backwards from the most recent census. Expect spelling and age variations.
Evidence: Direct Information in this source seems to address the research question all by itself.evidence speaks to the point in question.
[Sources & Evidence]
USCIS (U.S. Citizenship and Immigration Services) was formerly known as INS (Immigration and Naturalization Service). Searching for Immigration and naturalization records is essential in genealogy research. The website which allows patrons to order index searches or record copies is at: CISHistory.Library@dhs.gov. Payment is required for searching the indexes, and then payment again to obtain copies of records located. 20th century records include: Certificate Files (C-Files); Registry Files; Visa Files; Alien Registration and A-Files.