i think magnetic field's 69 love songs is a good album for breakups... it has some really good songs about breakups... but it also has all sorts of differnt songs about love... happy and sad. there's a good variety of happy and sad songs so, i don't become despondent & kill myself...
but other than that,
i really like the beatles "for no one" (because really, it describes everything perfectly), white stripes "don't know what to do with myself" (when i'm feeling campy), elo "sweet talking woman" (when i feel like it'd be nice to hear a man sounding sad & desperate
), and the beatles "here comes the sun" (when i want to feel like there are good things coming in the future)