Interesting question. For a start, I wrote this piece a while back on films that make me cry:
https://medium.com/fan-fare/twelve-films-that-made-me-cry-fc92098d742c
As for music, I can't listen to Beethoven's 7th Symphony, 2nd Movement, without getting tears in my eyes, because I was listening to the damn thing when I got the call from my mother that my father had died. In a cruel twist of fate, back at work about two months later, whilst dressing a set for a TV shoot, a classical radio station was playing in the background. No prizes for guessing what came on. One of my colleagues started staring at me after a while, asking me if I was alright, as I had tears in my eyes.
I hate you Beethoven.
I also can't listen to John Tavener's absolutely sublime Funeral Canticle (brilliantly used during the opening section of Terrence Malick's The Tree of Life) without tearing up, but the reasons behind that are far too complex and personal to get into here.
As for pop music, occasionally sheer time machine wistful nostalgia gets me, as contemporary songs become so inextricably linked with memory. It isn't the songs themselves so much (or at least, rarely).
Finally TV: The Doctor Who story Human Nature/The Family of Blood, with its double whammy of sacrificial unrequited love ("He was braver than you") and the incredibly moving way it honoured WWI veterans, sent me over the edge the first time I saw it.
Also, the And Maggie Makes Three episode of The Simpsons. ("Do it for her.")
Commercials don't make me cry, and any attempt by advertisers to shamelessly manipulate me in that way (I'm thinking mostly of Christmas commericals) causes a gag reflex. However, I admit this won me over (though I didn't cry). Not that this is an excuse for anyone to ever consider a sequel. God forbid.