What happened, what they want, what's next
Good notes answer three questions: what was discussed, what the customer asked for, and what happens next. One or two lines each is enough.
Let tags do the counting
Use outcome tags — order placed, follow-up needed, service done — for anything you'll want to count later. Keep the note for context.
Photos beat descriptions
A shelf photo says more than “display looks fine”. Attach it to the visit so it's there next time.