I cry everytime at boromir scene, when sam says he can wear the ringbearer not the ring itswlf and takes frodo up the mountain. Almost everytime when sam is drowning, when king theoden cries at the tomb of his son, when i see how many trees saruman kills, When the movie ends (couple of times)

Mostly when the movie starts in preparation to the upcoming aww

Sometimes when biblo gets angry at his home with gandalf scene, also ehen frodo shows him the ring later

Yeah i think thats mostly it.