I still use the same method when I'm not doing NaNo as it stops me from getting bogged down in perfectionism and helps me to move through the story. Ideas come quicker and flow easier, often ideas I would never have come up with if I had been agonising over what to write or trying to craft the perfect sentence.
The next stage is the edit, that where I take time to remove all the extra bits I haven't filtered out but I still work fast, setting myself a certain number of pages each day. I always know I will go back and re-edit the pages and probably will several times, so it takes off the perfection pressure.
Writing and editing is a process of layering the story, adding details, taking away any unnecessary words and scenes until it just feels right. Once I got comfortable with that (or remember that) it all gets much easier and much more fun.
I've finished my first novel while enjoying copious amounts of chocolate and cake.