I just finished reading the book Two Scoops of Django. It was highly recommended to me by members of the Bay Area Python Interest Group. It covers Django best practices. In short, I loved it!
It's not an introduction, tutorial, or a reference for Django. In fact, it assumes you've already gone through the Django tutorial, and it occasionally refers you to the Django documentation. Rather, it tells you what you should and shouldn't do to use Django effectively. It's very prescriptive, and it has strong opinions. I've always enjoyed books like that. Best of all, it's only about 300 pages long, so it didn't take me that long to read.
Having read the book cover-to-cover, even though I'm fairly new to Django, I kind of feel like I know what I'm doing at this point--at least a little ;) I was afraid when I started using Django that I wouldn't have that feeling until I had used it for a couple years.
So, if you're using Django, I highly recommend it!