Stanczyk apologizes for being away for a few days. I have spent some of that time preparing for the 1940 US Census (sans index).
So I made extensive use of Drs: Steve Morse & Joel Weintraub 1940 Census Tool .
I created a spreadsheet. I listed the most important people I wanted to find in 1940. I used the 1930 US Census and recorded their Enumerated District (ED). This is a necessary precursor to looking up the ED’s for 1940. The only other way is to start from a street address. Now use the link to the 1940 Census Tool [see above] to convert your 1930 EDs to 1940 EDs (or your last known address to 1940 EDs).
How are you preparing? This is what I used …