One of the things that I consider important for my NaNo success is my NaNo writing buddy - Cami.
We both use Skype and send each other quick texts throughout the NaNo season.
We encourage each other, try to shame each other, and generally motivate each other to write enough words to stay on track. We've done word wars against each other. We ask each other random questions about plots.
We also complain about characters going off on tangents, how much we don't want to write today, why on earth do we do this to ourselves every year.
None of this may sound like much but it is part of my NaNoWriMo process and part of the reason that I've actually succeeded every year. The novels are never completed in that month, and they'll certainly need much editing at some point but they are 50,000 + words along by the end of the month.