How about:
Fly a proper sized circuit, rather than a tour of the locality whilst your instructor tells you what a tw@t you have been. The bigger the circuit, the more words, therefore the bigger the tw@t...!
Stick to the correct circuit height.
Join the circuit correctly, not on an 8nm straight in approach and then cut everyone up who has bothered to do it correctly.
Dont descend to 100ft 5 miles out and then hedge hop to short finals. Whatever happened to a well judged glideslope?
Dont land 3/4 of the way down the runway. The numbers are there to aim at!
After landing on a grass runway, dont just wander aimlessly down the runway looking for a turn off if there isnt one. Think of all those behind you...
Dont fly over the noise sensitive village on crosswind leg , even when the AIP says not to. Just modify your circuit join procedure...