http://dallaspua.com/forum/viewtopic.php?t=2199
I qualify much the same way in person as I have done here.
It's as simple as asking an open ended question and then geniunely being intrested in the deep answer she gives you. Most times the first answer will be a fake shraud to get you to think you are actually building comfort so that way you feel comfortable enough to start asking her if "she wants some dick with that". Get her into the state first, where she is tied into herself emotionally
Since normally shes just bidding her time, you have now broken her state and gotten her into an emotional spot, so now you may move to qualify.
Get her to actually reveal something to you that you can be intrested in and then throw out a general observation.
If you throw something out there like, "I hate when girls dye their hair."
And she responds to that with something like, "I only dye it on special occasions." She is qualifying, and that happens more than you might think.
Most PUA's I have seen who "qualify" are doing an over-qualifying job and they loose the interaction. Theres a reason why if you have ever observed a guru, they seem to just be having a natural conversation, and not picking women up. Its because they are. They geniunely have a type of girl in mind or better yet, an outcome. If the girl fits into the outcome or type they are looking for then they pursue it, if not, they ditch the girl.
In order to qualify you have to have a list of things in which you can compare it to. I would recommend making a list of traits you want in a women, commit it to memory, and from there it should extremely easy and natural to qualify.