Yeah, so I never addressed the actual concerns you had in this post.
My bad.
About approach anxiety:
The best you can do is just get out there and approach.
If you have to, start with girls that aren't even that pretty.
Start saying "Hi" to everybody you walk past.
Try holding eye contact with somebody when you walk by, instead of glancing quickly, then looking away.
All very little things, but they break down the mental barriers.
Having pre-conceived material for openers helps.
Take a look at some of the other stuff around the forum.
As for running out of things to talk about.
Slai (one of the guys on here) said something about keeping a cheat sheet in your phone.
Set up a quick to access note on your phone, and act like you're getting a text.
Lastly, I suggest checking out this post:
http://pick-up-artist-forum.com/transce ... t1991.html