I installed the trial of Liquid Story Binder two days before NaNo started, then found the two resources that para has listed, along with another -
http://www.todayiread.com/lsbxe-nanowrimo-tutorial/. Between the two, I figured out a set up that worked for me, to start with. When the price dropped for November, I decided that I liked it enough to grab a license for it. The price drop was extended, but I don't know the end date.
It is complex, but to get used to it and use it during NaNo, I only used the bits described in the two tutorials. Now, I'm playing with the other parts, to see what will fit my own workflow. It's been designed to adapt to various needs. You don't need, and shouldn't try, to use all of it - just what works for you. I especially like that I can run it from a USB drive. So, it's installed on my desktop, netbook and a USB stick; then, I use SyncToy to keep them synchronized.
I had a problem with restoring from backup, but I'm hoping the user group will help me figure that out.
You should check out those tutorials and download the trial, to see if you like it.
Btw, I'm on a PC.