Here's some I've collected:
"The wages of sin are death; but after they're done taking out taxes, it's just a tired feeling." -- Unknown
"Like so many Americans, she was trying to construct a life that made sense from things she found in gift shops." -- Kurt Vonnegut, Jr.
"Live as if you were to die tomorrow. Learn as if you were to live forever." -- Mahatma Gandhi
"Life is like a box of stuff, and you can't open it, and you don't know whats inside, or anything." -- From some message board post by someone called Drillmonkey
"I don't want the world, I just want your half." -- They Might Be Giants, "Ana Ng"
"If it wasn't for disappointment, I wouldn't have any appointment." -- They Might Be Giants, "Snowball in Hell"
"But you should never be embarrassed by
your trouble with livin'
'cause it's the ones with the sorest throats
who've done the most singin'"
-- Bright Eyes, "Laura Laurent"
"The truth is, you could slit my throat, and with my one last gasping breath, I'd apologize for bleeding on your shirt."
-- Taking Back Sunday, "You're So Last Summer"
"Fondle, fuck, and forgive eventually,
This is how we taint our heart.
It was a twenty-six night stand,
embarrassed but I understand."
-- Kind of Like Spitting, "The Short Story Long"
I'm sure I'll come up with more...