Most Xero files we inherit are set up once and never revisited. These five changes take twenty minutes and pay for themselves in the first month-end.
Lock dates and tracking
Set a lock date after every reconciliation so history stops moving. Then turn on tracking categories that match how you actually think about the business — by product line, by site, by crew.

Bank rules that do not lie
Bank rules are a time-saver until they start coding things wrong at scale. Keep them narrow, review them quarterly, and never let a rule guess at a GST treatment.