This does it for me every time I hear it,
"Isn't it a pity", written by George Harrison and performed here at his memorial (Concert for George) by some of the all time greats of popular music.
One day like this by Elbow- reminds me of how much I love my wife
Guide me oh though great redeemer - played at my dad's funeral (a fiercly proud welshman). Sister had it as one of her songs at her wedding in August and I couldn't sing a word of it
Depends what kind of mood you are in though to make you feel like you need a cry. I have'nt ever cried to that song but its not good to listen to when you feel like shite.