S.L.
My pediatrician recommended the Potty Training In a Day method. Basically, you pick one day that you can devote entirely to potty training. You set the timer for 20 minutes, and every time it goes off, you take your daughter to the potty seat to sit for a few minutes. Eventually, she'll end up peeing in the potty. When she does, you make a big deal about it. My sons both got to call Daddy at work and grandma, who also made a huge deal out of it.
Your daughter will "get it." But now she just doesn't understand what you want her to do when you sit her on the toilet.
We also liked books about potty training. I think what works will be different for each child. My first son had a book that explained what the potty seat was for. He really understood the concept from the book. Of course, talking about it is very important. That book was packed away when my second son needed it, so we just talked about it instead. What really did it for my second son was a book called "No More Diapers for Ducky." The book itself was pretty lame, but the title caught on, and he kept saying, "No more diapers for Zachy."
Speaking of books, books are wonderful to have in the bathroom. The longer you can keep your daughter sitting on the potty by reading a book, the higher her chances are of going pee!