Step 1: Chose an impossibly long project. I find that battling over the fate of the world, uncovering ancient secrets, and falling in love tends to fit that bill quite well. Step 2: Write many, many POVs. Step 3: WRITE IT ALL AT ONCE GO GO GO GO GO FORGET ABOUT EDITING THAT IS A FUTURE ME PROBLEM.
Oh. Oh right. And I also struck a deal with myself, at the end of November, that if I pushed the rough draft to 150k and pulled off a triple NaNo, I could buy a black friday PS4.