Just before importing, display example table of import data fields
Display 5 or 6 examples lines of imported data, BEFORE actually importing. Reason: Somehow the phone numbers failed to import, even though I thought I'd checked everything carefully. Seeing a table of sample data for several records would have clearly shown me that the phone number column was empty.
-
Randy Rensch commented
When importing records, check for invalid email addresses BEFORE the import, not after! In fact, it would be easier to have the whole file rejected, so I can fix it, rather than have to manually import the rows that were rejected!!