I hope this is true...

This has helped me so much with dissertation writer's block:


Roald Dahl supposedly said:

I never come back to a blank page; I always finish about halfway through. Hemingway taught me the finest trick : “When you are going good, stop writing.” You don’t go on writing and writing until you come to the end of it, because when you do, then you say, well, where am I going to go next? You make yourself stop and you walk away. And you can’t wait to get back because you know what you want to say next.



i.e. stop when you know where you are going next.

I hope it's true.  If not, I'm still gonna use it. 



(I can only find one source...please point me to somewhere reliable)