One of the only problems i've encountered with women after reading material on this website is the whole 'being a challenge' thing. Now, of course, being a challenge is a good thing. Personally, I just took it to too much of an extreme, to the point where I really wouldn't go for the girl. In some cases the girls would go after me...but only for a little while, then they'd lose interest.
My advice, hang out with the girl you're interested in, not neccesarily as dating to begin with, but don't let that stop you from flirting with them. After a little while, stop seeing them as much...give them something to miss.