There's a ton of songs that really affect me, some it's hard to between the music itself and just the memories associated with it. There's some that I would guess are more-or-less universal like Yusuf / Cat Stevens - Father & Son or Aphex Twin - Avril 14th.
Shpongle -I Woke Up as a Shlummutz ~1:40 when the cello(?) comes in really hits me for some reason.