Spinner magazine has published a list of the 25 best opening lyrics.
Here are some of my faves:
"You were working as a waitress in a cocktail bar"
"I've been a bad, bad girl"
"I was dreaming when I wrote this"
"Tommy used to work on the docks"
"Well, she was just seventeen -- you know what I mean"
and, of course,
"Go, shorty. It's your birthday"