To be honest; if you're meeting a girl you met online you really shouldn't be walking away without getting laid. (Enough double negatives in that sentence..?).
I always stress that I NEVER sleep with girls on a first date, usually don't even kiss; and make them think they are very very fortunate to get on a date with me (Of course my sole intention is to nail them on the first meeting). It helps if you cancel once or twice so that they think you have an important busy life (it just so happens I do and have to cancel a lot!).
Wherever possible manouvre the date to yours or hers (for whatever reason). Once you are in either of your houses the job is pretty much done.
What websites do you guys use? I've had a lot of success with
www.plentyoffish.com.