I have a scene I have trying to write since Christmas and everything in me is refusing to write. I know I need to do it, I am not blocked I know what it contains and I know really I just need to push it. It is not a case of forcing myself to write since Christmas day - I have written a 20K novella, 10K of this book (avoiding said scene), eight short stories and started two new novels. I'm not unproductive. How do you get the courage to write the really difficult stuff ? The stuff you know will make you weep, wail and gnash of teeth?