1. Themselves - the easiest topic to get them talking about. Ask a woman how her day went and that'll usually give you at least a good hours worth of material, if you just learn how to fill in your parts with the appropriate "mhm, that's interesting" "oh really?" "and how did that go?" etc.. Transitional phrases.
2. Celebrity gossip - I wouldn't necessarily recommend that you go do research on it or anything like that but I know its something most (not all) women are into.
3. Clothes, shoes, hair, i guess this kind of stuff could all go in one category.
4. Men.. although again I wouldn't recommend that one.
I can typically get enough out of the #1 thing I put that I don't need anything else. LOl.
Be careful with your heart, because when someone seems too good to be true, they usually are.