First off I want to say that I'm having a hard time aproaching in day broadlight or in clubs. But surprisingly my best pick-up worked in trains or in the bus when going from one town to another.
Luckily I'm pretty good at maintaining a good conversation with so many people so I have no problem in keeping the stuff interesting. I don't know why but aproaching in trains is so much easier and she can know you better because let's face it: she's gonna stay there and not leave anywhere untill she reaches her destination. Offcourse I'm not saying to be a jackass.
You'll be surprised but most of the time I open with:
Hi! My name is....(fill with your name) Nice to meet you...
And then the conversation tooks off depending on the situation. One time I remember that I've gone through several compartiments in the train and picked the only one with one chick and I've chatted the whole road (so you can do the same). One girl had a violin and I've started talking about what does she do with it. I've found out that she was in classical music and as I said then the conversation took a really good turn.
Another time a girl was reading something (it was more like studying for an exam) and I've opened with:
"You know if you are reading one more line your head is gonna explode" and she started to laugh and with this the conversation was open.
Last time I did it I just presented myself and she was wearing some really cool glasses and I've asked where did she got those? And then I've talked about how some people could modify their vision by training the eye muscles just like any other muscle in the body (I watched this on a documentary btw -> I watch a lot of documentaries

)
I hope I helped you a bit. I'm still strugling with AA in day broadlight or in clubs. One step at a time though. Always improving never going back.