The Wrestler (The scene where Mickey Rourke tells his daughter "I just don't want you to hate me")
Independence Day (When Randy Quaid asks the President to tell his kids that he loves them just before flying his jet into the alien ship main gun)
My Girl (The scene with Thomas J's funeral when Veda has a total breakdown, and during her poem at the end of the movie)
Armageddon (When Bruce Willis sacrifices himself to blow up the asteroid)
Deep Impact (When the astronauts were saying goodbye to their families before flying their shuttle into the comet to blow it up)
Return Of The King (When Frodo says goodbye to Merry, Pippin, and Sam before boarding the ship)
Best Of The Best (This one is actually my mom's. She always bawls her eyes out when Team Korea gives their gold medals to Team USA)
Buffy The Vampire Slayer: Season 5 (Episode: The Body. When Buffy finds her mom dead. The whole damn episode is pretty tear worthy)
M*A*S*H: The Series (Specifically the episode where Col Henry Blake died, the episode where Radar went home, the episode where Hawkeye was in a mental hospital, and the series finale)
That's about all I can think of right now.