I've been waiting for this...
You are NOT SUPPOSED to be looking at hot chicks, waiting for them to check you out...you are supposed to be looking to see WHO IS checking you out!
Generally speaking, I don't do this.
I do only one of two things; First look at the woman in total appreciation of her (as her being, not her beauty) - this I've found to be most effective, with women approaching me, waving at me, saying 'hello!' etc.
The second thing I do is, look away from the women, in total appreciation of the sky/where I am/how great my life is. This tends to get the girl to look at me, quite blatently, for lengthy periods. However, when I 'catch' her looking at me, she looks away in guilt. I have never apporached a woman under those conditions though.
My question to you is, when you're walking down the street, do you look at every girl, do you look at some girls (that catch the eye), or do you ignore them completely?
Practically, how does it translate in your experience?