I'm currently living in China and study by myself mostly with the New Practical Chinese Reader and Skritter
I have a student listen to me speak for a couple hours during the week, and then a Chinese teacher tutors me using the text for a couple hours on Saturday.
This, and Skritter, are pretty much everything I use. What else do people use to study? I'm just starting to learn particles like "ba" 把 which is pretty difficult. Do you use any grammar workbooks, or exercise books, to drill this stuff?
Thanks in advance!