01The opening hours
Handle the high-authority sources by hand and batch the long tail afterwards.
02Business listings audit
By contrast, a workable routine is to claim at the start of every quarter and log every change with a date.
03Where duplicate profiles hides
Give one person the logins and one document the truth; ambiguity is what causes drift.
04Where an abandoned profile hides
What follows from this is that confirm by phone or postcode lookup, not by memory.
05The NAP records confirm
Work from the aggregators outward, because fixing a source fixes everything downstream.