Do you consider yourself a NaNo failure because you haven't churned out 50,000 words? I didn't, and I don't. My goal was to pick up my writing speed ... and I did it. I'm thinking I doubled it from 500-words-a-day to a thousand, sometimes more, depending on what the priority task is for the day.
Thanks to The Colorado Writer's Daily by Tamela Buhrke, I found Rachel Aaron's blog on how she increased her writing speed to 10,000 words a day. -- The screaming you hear are my thumbs. If they could run, they'd be heading for the hills at such a thought. -- Aaron gives both some great macro- and micro-tips on increasing your word flow. Give her a read. You may find something useful.
My favorite insight was one I sort of fell over while doing NaNoWriMo. -- I realized I didn't have to outline to increase my word flow. I just needed to know what direction I was going. I set up docs for my chapters: 1, 2, 3, etc. Then, started writing notes to myself at the top of each chapter in red. As a thought occurred to me, I'd jot it down on a sticky note ... and then, add it to an appropriate chapter. If the idea didn't get used when the chapter was done, I transferred it down the line ... until it was thrown away in the "bits and pieces" file.
Point: Even if you don't suceed in writing 50,000 words in one month, you may still have set a continuing pattern or habit that'll help you be more productive. Oh, yes. I realize NaNoWriMo isn't done as I write this, but I'm done. I quit trying before my thumbs gave out. Like, I'll be able to write tomorrow.
While not writing for Thanksgiving, I wrote a new opening chapter for The Somant Troubles ... which hooks readers with an unusual situation [I hope] that shows the MC's [Mariah] openness to the "99%" of the Marches. Then, the chapter introduces the continued bickering between Mariah and Linden plus how she maintains her friends at the Half-Elven military Camp even though Linden has banished her.
Now, I still have to write the ending, ie. give more detail and action to the summary for chapters 20/21 or combine them into one. -- Who knows what'll happen tomorrow.