The perfect time to put the flaps out....
"I think you configured too early, you could of waited a little bit longer"
next flight
"I think your approach was a bit sporty"
next flight
"In that instance, it would have been much better to use 'Vertical Speed'"
next flight
"You should always use 'Flight Level Change' "
Actual quotes of training pilots...."the grades like a circle...don't try to hard for a 5 because it might go back around and become a 1"
"You didn't appear to be confident" (many trainers are also qualified psychologists)
"don't taxi over the centerline lights" or "taki between them" or "taxi to the left of them" or "you should always stay on the centerline"