I think everyguy has this problem when trying to become a mPUA. As you get better and better at it, you find out repeatable topics to talk about, maybe something you heard earlier that day from a different set, or something that most girls seem to find interesting. (So far from my experience) It's true, try not to talk about school or work, or family. UNLESS you can build some sort of emotional connection from it. Because in essence that is what you are trying to do.
For example for the most part most college students don't really have an idea what they want to do. But it's going to come up in casual fluff, I'm a pre-med major and have all these plans to go to a particular college and whatnot. Once this girl I tried dating found out about this (failed

, mother lost a foot, she dropped out, just thought I put that there) she opened up, she wanted to study dentistry at the same college, and our paths seemed to roughly on the same page. Before that she didn't have a bitch shield, it was more like a study-shield. But anyways, there was an emotional bond. (Also just an FYI, even though I have all these plans and stuff, normally I hate talking about school, while I'm away from school, I want to be thinking about something else, my paragraph about work will explain it)
If you start talking about family, the goal would be to create an emotional bond. This is done through broad general truths.
Oh you're a middle child too, don't you hate that bratty younger brother?
(I'm not a youngest so I'm not sure about this) Oh you're youngest also? Isn't it nice to get everything we want? (Both these lines aren't field tested but I'm sure they will work fine just FYI)
And for work, just stay away from this. Especially if you are younger than 25, most people below 25 are not doing job's they are passionate about. And in fact, most people above 25 are not doing job's they are passionate about. They work all day, every day, at the same job. It's absolutely boring, its NLP. If you start talking about work at all, it's going to bring those feelings of work up and most likely turn them off (This is how I feel)
So it's all about creating emotional bonds. Eventually you just get better and better at it. It's a skill set, don't think of it anyway else, it'll just take time. Someone posted on here, do not use any fluff, because it wastes time (I think it was Tripp). So I know I probably didn't help you much on what to talk to women about but hopefully this will help
Anything situational,
(New Years just happened, talk about that, new years resolutions or what not, new years party, new years story)
(Valentines day is coming up, I don't know of much to say here except ask what their work valentines day was or something like that.)
(Crazy redneck in the truck that you almost ran into)
And if you know all this stuff and this post is worthless, sorry. I'm just trying to help, I'm not sure if I could help you but I tried.
I still have this problem actually so I would love to hear some feedback. once I get on one of my instant dates I get incredibly nervous and I feel there is tons of pressure to entertain/build attraction or comfort or whatever stage I'm in. I can handle myself for about 30 minutes or so (Not sure, I'm not looking at my watch or anything) then I run out of material.